* [Qemu-devel] [PATCH] Add gcc 4.0 support
@ 2006-02-15 12:25 Thiemo Seufer
2006-02-15 16:20 ` Johannes Schindelin
2006-03-28 14:09 ` Thiemo Seufer
0 siblings, 2 replies; 16+ messages in thread
From: Thiemo Seufer @ 2006-02-15 12:25 UTC (permalink / raw)
To: qemu-devel
Hello all,
the appended patch
- Adds detection of gcc commandline flag support, based on the theory
"If it exists, we want to use it".
- Uses this to add enough gcc4 flag magic to OP_FLAGS, and remove the
specialcasing for gcc3 as well as the bail out for gcc4.
- Makes CFLAGS and OP_CLFAGS distinct sets because options like -O0
are useful for debugging in CFLAGS but break qemu in OP_CFLAGS.
- Updates the ppc.ld script to work with gcc4.
- Adds preliminary mips/mipsel support to Makefile.target.
- Adds to RETURN and FORCE_RET a "memory" constraint to ensure it works
as optimisation barrier.
Caveats:
- Those changes weren't tested with earlier compilers. The linker
script probably requires some more recent ld. Please test if it
still works for you.
- The -malign-functions=0 is now used as a fallback for
-fno-align-functions on all architectures, not only on i386. This
might be wrong.
Tested on Debian unstable on powerpc, while working on improving the
mips emulation support.
Thiemo
Index: Makefile.target
===================================================================
RCS file: /sources/qemu/qemu/Makefile.target,v
retrieving revision 1.93
diff -u -p -r1.93 Makefile.target
--- Makefile.target 6 Feb 2006 04:11:15 -0000 1.93
+++ Makefile.target 15 Feb 2006 10:36:16 -0000
@@ -17,6 +17,14 @@ ifdef CONFIG_USER_ONLY
VPATH+=:$(SRC_PATH)/linux-user
DEFINES+=-I$(SRC_PATH)/linux-user -I$(SRC_PATH)/linux-user/$(TARGET_ARCH)
endif
+
+# cc-option
+# Usage: CFLAGS += $(call cc-option, -falign-functions=0, -malign-functions=0)
+
+cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
+ > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;)
+
+
CFLAGS=-Wall -O2 -g -fno-strict-aliasing
#CFLAGS+=-Werror
LDFLAGS=-g
@@ -65,15 +73,19 @@ ifdef CONFIG_STATIC
LDFLAGS+=-static
endif
-ifeq ($(ARCH),i386)
-CFLAGS+=-fomit-frame-pointer
-OP_CFLAGS=$(CFLAGS) -mpreferred-stack-boundary=2
-ifeq ($(HAVE_GCC3_OPTIONS),yes)
-OP_CFLAGS+= -falign-functions=0 -fno-gcse
-else
-OP_CFLAGS+= -malign-functions=0
-endif
+# We require -O2 to avoid the stack setup prologue in EXIT_TB
+OP_CFLAGS = -Wall -O2 -g -fno-strict-aliasing
+OP_CFLAGS += $(call cc-option, -fno-reorder-blocks, "")
+OP_CFLAGS += $(call cc-option, -fno-tree-ch, "")
+OP_CFLAGS += $(call cc-option, -fno-optimize-sibling-calls, "")
+OP_CFLAGS += $(call cc-option, -fno-crossjumping, "")
+OP_CFLAGS += $(call cc-option, -fno-align-labels, "")
+OP_CFLAGS += $(call cc-option, -fno-align-jumps, "")
+OP_CFLAGS += $(call cc-option, -fno-align-functions, -malign-functions=0)
+ifeq ($(ARCH),i386)
+CFLAGS += -fomit-frame-pointer
+OP_CFLAGS += -fomit-frame-pointer -preferred-stack-boundary=2
ifdef TARGET_GPROF
USE_I386_LD=y
endif
@@ -91,64 +103,61 @@ endif
endif
ifeq ($(ARCH),x86_64)
-OP_CFLAGS=$(CFLAGS) -falign-functions=0
LDFLAGS+=-Wl,-T,$(SRC_PATH)/x86_64.ld
endif
ifeq ($(ARCH),ppc)
-CFLAGS+= -D__powerpc__
-OP_CFLAGS=$(CFLAGS)
+CFLAGS += -D__powerpc__
LDFLAGS+=-Wl,-T,$(SRC_PATH)/ppc.ld
endif
ifeq ($(ARCH),s390)
-OP_CFLAGS=$(CFLAGS)
LDFLAGS+=-Wl,-T,$(SRC_PATH)/s390.ld
endif
ifeq ($(ARCH),sparc)
-CFLAGS+=-m32 -ffixed-g1 -ffixed-g2 -ffixed-g3 -ffixed-g6
-LDFLAGS+=-m32
-OP_CFLAGS=$(CFLAGS) -fno-delayed-branch -ffixed-i0
-HELPER_CFLAGS=$(CFLAGS) -ffixed-i0 -mflat
+CFLAGS += -m32 -ffixed-g1 -ffixed-g2 -ffixed-g3 -ffixed-g6
+LDFLAGS += -m32
+OP_CFLAGS += -m32 -ffixed-g1 -ffixed-g2 -ffixed-g3 -ffixed-g6 \
+ -fno-delayed-branch -ffixed-i0
+HELPER_CFLAGS = $(CFLAGS) -ffixed-i0 -mflat
# -static is used to avoid g1/g3 usage by the dynamic linker
LDFLAGS+=-Wl,-T,$(SRC_PATH)/sparc.ld -static
endif
ifeq ($(ARCH),sparc64)
-CFLAGS+=-m64 -ffixed-g1 -ffixed-g2 -ffixed-g3 -ffixed-g6
-LDFLAGS+=-m64
-OP_CFLAGS=$(CFLAGS) -fno-delayed-branch -ffixed-i0
+CFLAGS += -m64 -ffixed-g1 -ffixed-g2 -ffixed-g3 -ffixed-g6
+LDFLAGS += -m64
+OP_CFLAGS += -m64 -ffixed-g1 -ffixed-g2 -ffixed-g3 -ffixed-g6 \
+ -fno-delayed-branch -ffixed-i0
endif
ifeq ($(ARCH),alpha)
-# -msmall-data is not used because we want two-instruction relocations
-# for the constant constructions
-OP_CFLAGS=-Wall -O2 -g
# Ensure there's only a single GP
CFLAGS += -msmall-data
+# -msmall-data is not used for OP_CFLAGS because we want
+# two-instruction relocations for the constant constructions
LDFLAGS+=-Wl,-T,$(SRC_PATH)/alpha.ld
endif
ifeq ($(ARCH),ia64)
CFLAGS += -mno-sdata
-OP_CFLAGS=$(CFLAGS)
+OP_CFLAGS += -mno-sdata
LDFLAGS+=-Wl,-G0 -Wl,-T,$(SRC_PATH)/ia64.ld
endif
ifeq ($(ARCH),arm)
-OP_CFLAGS=$(CFLAGS) -mno-sched-prolog -fno-omit-frame-pointer
+OP_CFLAGS += -mno-sched-prolog -fno-omit-frame-pointer
LDFLAGS+=-Wl,-T,$(SRC_PATH)/arm.ld
endif
ifeq ($(ARCH),m68k)
-OP_CFLAGS=$(CFLAGS) -fomit-frame-pointer
-LDFLAGS+=-Wl,-T,m68k.ld
+OP_CFLAGS += -fomit-frame-pointer
+LDFLAGS+=-Wl,-T,$(SRC_PATH)/m68k.ld
endif
-ifeq ($(HAVE_GCC3_OPTIONS),yes)
-# very important to generate a return at the end of every operation
-OP_CFLAGS+=-fno-reorder-blocks -fno-optimize-sibling-calls
+ifeq ($(ARCH),mips)
+LDFLAGS+=-Wl,-T,$(SRC_PATH)/mips.ld
endif
ifeq ($(CONFIG_DARWIN),yes)
Index: configure
===================================================================
RCS file: /sources/qemu/qemu/configure,v
retrieving revision 1.82
diff -u -p -r1.82 configure
--- configure 9 Feb 2006 17:58:47 -0000 1.82
+++ configure 15 Feb 2006 10:36:16 -0000
@@ -274,34 +274,6 @@ if test "$cpu" = "sparc64" -o "$cpu" = "
hostlongbits="64"
fi
-# check gcc options support
-cat > $TMPC <<EOF
-int main(void) {
-}
-EOF
-
-have_gcc3_options="no"
-if $cc -fno-reorder-blocks -fno-optimize-sibling-calls -o $TMPO $TMPC 2> /dev/null ; then
- have_gcc3_options="yes"
-fi
-
-# Check for gcc4
-if test "$check_gcc" = "yes" ; then
- cat > $TMPC <<EOF
-#if __GNUC__ >= 4
-#error gcc4
-#endif
-int main(){return 0;}
-EOF
- if ! $cc -o $TMPO $TMPC 2>/dev/null ; then
- echo "ERROR: \"$cc\" looks like gcc 4.x"
- echo "QEMU is known to have problems when compiled with gcc 4.x"
- echo "It is recommended that you use gcc 3.x to build QEMU"
- echo "To use this compiler anyway, configure with --disable-gcc-check"
- exit 1;
- fi
-fi
-
##########################################
# SDL probe
@@ -388,7 +360,7 @@ echo " --enabled-dsound enable
echo " --fmod-lib path to FMOD library"
echo " --fmod-inc path to FMOD includes"
echo ""
-echo "NOTE: The object files are build at the place where configure is launched"
+echo "NOTE: The object files are built at the place where configure is launched"
exit 1
fi
@@ -477,9 +449,6 @@ echo "docdir=$docdir" >> $config_mak
echo "#define CONFIG_QEMU_SHAREDIR \"$datadir\"" >> $config_h
echo "MAKE=$make" >> $config_mak
echo "CC=$cc" >> $config_mak
-if test "$have_gcc3_options" = "yes" ; then
- echo "HAVE_GCC3_OPTIONS=yes" >> $config_mak
-fi
echo "HOST_CC=$host_cc" >> $config_mak
echo "AR=$ar" >> $config_mak
echo "STRIP=$strip -s -R .comment -R .note" >> $config_mak
Index: dyngen-exec.h
===================================================================
RCS file: /sources/qemu/qemu/dyngen-exec.h,v
retrieving revision 1.26
diff -u -p -r1.26 dyngen-exec.h
--- dyngen-exec.h 24 Jul 2005 15:11:38 -0000 1.26
+++ dyngen-exec.h 15 Feb 2006 10:36:16 -0000
@@ -155,7 +155,7 @@ extern int printf(const char *, ...);
#endif
/* force GCC to generate only one epilog at the end of the function */
-#define FORCE_RET() asm volatile ("");
+#define FORCE_RET() __asm__ __volatile__("" : : : "memory");
#ifndef OPPROTO
#define OPPROTO
Index: ppc.ld
===================================================================
RCS file: /sources/qemu/qemu/ppc.ld,v
retrieving revision 1.2
diff -u -p -r1.2 ppc.ld
--- ppc.ld 5 Jun 2005 15:57:04 -0000 1.2
+++ ppc.ld 15 Feb 2006 10:36:16 -0000
@@ -2,8 +2,8 @@
* Written by Martin Mares <mj@atrey.karlin.mff.cuni.cz>;
*/
OUTPUT_FORMAT("elf32-powerpc", "elf32-powerpc", "elf32-powerpc")
-OUTPUT_ARCH(powerpc)
-SEARCH_DIR(/lib); SEARCH_DIR(/usr/lib); SEARCH_DIR(/usr/local/lib); SEARCH_DIR(/usr/alpha-unknown-linux-gnu/lib);
+OUTPUT_ARCH(powerpc:common)
+SEARCH_DIR(/usr/powerpc-linux-gnu/lib); SEARCH_DIR(/usr/local/lib); SEARCH_DIR(/lib); SEARCH_DIR(/usr/lib)
ENTRY(_start)
SECTIONS
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*(COMMON)
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}
Index: target-mips/exec.h
===================================================================
RCS file: /sources/qemu/qemu/target-mips/exec.h,v
retrieving revision 1.6
diff -u -p -r1.6 exec.h
--- target-mips/exec.h 17 Dec 2005 01:11:12 -0000 1.6
+++ target-mips/exec.h 15 Feb 2006 10:36:16 -0000
@@ -31,9 +31,9 @@ register double FT2 asm(FREG2);
#endif
#if defined (DEBUG_OP)
-#define RETURN() __asm__ __volatile__("nop");
+# define RETURN() __asm__ __volatile__("nop" : : : "memory");
#else
-#define RETURN() __asm__ __volatile__("");
+# define RETURN() __asm__ __volatile__("" : : : "memory");
#endif
#include "cpu.h"
Index: target-ppc/exec.h
===================================================================
RCS file: /sources/qemu/qemu/target-ppc/exec.h,v
retrieving revision 1.13
diff -u -p -r1.13 exec.h
--- target-ppc/exec.h 30 Oct 2005 18:16:26 -0000 1.13
+++ target-ppc/exec.h 15 Feb 2006 10:36:16 -0000
@@ -38,9 +38,9 @@ register uint32_t T2 asm(AREG3);
#define FT2 (env->ft2)
#if defined (DEBUG_OP)
-#define RETURN() __asm__ __volatile__("nop");
+#define RETURN() __asm__ __volatile__("nop" : : : "memory");
#else
-#define RETURN() __asm__ __volatile__("");
+#define RETURN() __asm__ __volatile__("" : : : "memory");
#endif
#include "cpu.h"
--- /dev/null 2006-02-12 07:33:50.693000000 +0000
+++ mips.ld 2006-02-15 11:53:25.000000000 +0000
@@ -0,0 +1,225 @@
+/* Default linker script, for normal executables */
+OUTPUT_FORMAT("elf32-tradbigmips", "elf32-tradbigmips",
+ "elf32-tradlittlemips")
+OUTPUT_ARCH(mips)
+ENTRY(__start)
+SEARCH_DIR("/usr/mips-linux-gnu/lib");
+SECTIONS
+{
+ /* Read-only sections, merged into text segment: */
+ PROVIDE (__executable_start = 0x0400000); . = 0x0400000 + SIZEOF_HEADERS;
+ .interp : { *(.interp) }
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+}
^ permalink raw reply [flat|nested] 16+ messages in thread* Re: [Qemu-devel] [PATCH] Add gcc 4.0 support
2006-02-15 12:25 [Qemu-devel] [PATCH] Add gcc 4.0 support Thiemo Seufer
@ 2006-02-15 16:20 ` Johannes Schindelin
2006-02-15 19:10 ` Thiemo Seufer
2006-03-28 14:09 ` Thiemo Seufer
1 sibling, 1 reply; 16+ messages in thread
From: Johannes Schindelin @ 2006-02-15 16:20 UTC (permalink / raw)
To: qemu-devel
Hi,
AFAIR gcc 4 had different problems on different platforms. Does your patch
solve them?
Ciao,
Dscho
^ permalink raw reply [flat|nested] 16+ messages in thread
* Re: [Qemu-devel] [PATCH] Add gcc 4.0 support
2006-02-15 16:20 ` Johannes Schindelin
@ 2006-02-15 19:10 ` Thiemo Seufer
2006-02-15 22:04 ` Johannes Schindelin
0 siblings, 1 reply; 16+ messages in thread
From: Thiemo Seufer @ 2006-02-15 19:10 UTC (permalink / raw)
To: qemu-devel
On Wed, Feb 15, 2006 at 05:20:07PM +0100, Johannes Schindelin wrote:
> Hi,
>
> AFAIR gcc 4 had different problems on different platforms. Does your patch
> solve them?
I tested only Linux/powerpc and checked the disassembly there. I
believe the patch will improve the situation generically for all
platforms, but I may have missed some bits.
If you describe a specific problem I can probably tell you if it
is covered by my patch.
Thiemo
^ permalink raw reply [flat|nested] 16+ messages in thread
* Re: [Qemu-devel] [PATCH] Add gcc 4.0 support
2006-02-15 19:10 ` Thiemo Seufer
@ 2006-02-15 22:04 ` Johannes Schindelin
0 siblings, 0 replies; 16+ messages in thread
From: Johannes Schindelin @ 2006-02-15 22:04 UTC (permalink / raw)
To: qemu-devel
Hi,
On Wed, 15 Feb 2006, Thiemo Seufer wrote:
> If you describe a specific problem I can probably tell you if it
> is covered by my patch.
I had the impression something went wrong on MinGW32: I did not try
myself, but IIRC there were multiple "ret" statements per compiled oplet.
Since I was not experiencing the problem, maybe some people who did could
help me out here?
Ciao,
Dscho
^ permalink raw reply [flat|nested] 16+ messages in thread
* Re: [Qemu-devel] [PATCH] Add gcc 4.0 support
2006-02-15 12:25 [Qemu-devel] [PATCH] Add gcc 4.0 support Thiemo Seufer
2006-02-15 16:20 ` Johannes Schindelin
@ 2006-03-28 14:09 ` Thiemo Seufer
2006-03-29 4:26 ` John Davidorff Pell
2006-04-03 15:42 ` Dirk Behme
1 sibling, 2 replies; 16+ messages in thread
From: Thiemo Seufer @ 2006-03-28 14:09 UTC (permalink / raw)
To: qemu-devel
On Wed, Feb 15, 2006 at 12:25:01PM +0000, Thiemo Seufer wrote:
> Hello all,
>
> the appended patch
>
> - Adds detection of gcc commandline flag support, based on the theory
> "If it exists, we want to use it".
> - Uses this to add enough gcc4 flag magic to OP_FLAGS, and remove the
> specialcasing for gcc3 as well as the bail out for gcc4.
> - Makes CFLAGS and OP_CLFAGS distinct sets because options like -O0
> are useful for debugging in CFLAGS but break qemu in OP_CFLAGS.
> - Updates the ppc.ld script to work with gcc4.
> - Adds preliminary mips/mipsel support to Makefile.target.
> - Adds to RETURN and FORCE_RET a "memory" constraint to ensure it works
> as optimisation barrier.
>
> Caveats:
> - Those changes weren't tested with earlier compilers. The linker
> script probably requires some more recent ld. Please test if it
> still works for you.
> - The -malign-functions=0 is now used as a fallback for
> -fno-align-functions on all architectures, not only on i386. This
> might be wrong.
>
>
> Tested on Debian unstable on powerpc, while working on improving the
> mips emulation support.
Updated version, note that this is still not suitable for CVS since
x86 fails to build with it.
Thiemo
Index: Makefile.target
===================================================================
--- Makefile.target.orig 2006-03-28 15:05:19.000000000 +0100
+++ Makefile.target 2006-03-28 15:05:45.000000000 +0100
@@ -17,6 +17,14 @@
VPATH+=:$(SRC_PATH)/linux-user
DEFINES+=-I$(SRC_PATH)/linux-user -I$(SRC_PATH)/linux-user/$(TARGET_ARCH)
endif
+
+# cc-option
+# Usage: CFLAGS += $(call cc-option, -falign-functions=0, -malign-functions=0)
+
+cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
+ > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;)
+
+
CFLAGS=-Wall -O2 -g -fno-strict-aliasing
#CFLAGS+=-Werror
LDFLAGS=-g
@@ -65,15 +73,19 @@
LDFLAGS+=-static
endif
-ifeq ($(ARCH),i386)
-CFLAGS+=-fomit-frame-pointer
-OP_CFLAGS=$(CFLAGS) -mpreferred-stack-boundary=2
-ifeq ($(HAVE_GCC3_OPTIONS),yes)
-OP_CFLAGS+= -falign-functions=0 -fno-gcse
-else
-OP_CFLAGS+= -malign-functions=0
-endif
+# We require -O2 to avoid the stack setup prologue in EXIT_TB
+OP_CFLAGS = -Wall -O2 -g -fno-strict-aliasing
+OP_CFLAGS += $(call cc-option, -fno-reorder-blocks, "")
+OP_CFLAGS += $(call cc-option, -fno-tree-ch, "")
+OP_CFLAGS += $(call cc-option, -fno-optimize-sibling-calls, "")
+OP_CFLAGS += $(call cc-option, -fno-crossjumping, "")
+OP_CFLAGS += $(call cc-option, -fno-align-labels, "")
+OP_CFLAGS += $(call cc-option, -fno-align-jumps, "")
+OP_CFLAGS += $(call cc-option, -fno-align-functions, -malign-functions=0)
+ifeq ($(ARCH),i386)
+CFLAGS += -fomit-frame-pointer
+OP_CFLAGS += -fomit-frame-pointer -preferred-stack-boundary=2
ifdef TARGET_GPROF
USE_I386_LD=y
endif
@@ -91,64 +103,61 @@
endif
ifeq ($(ARCH),x86_64)
-OP_CFLAGS=$(CFLAGS) -falign-functions=0
LDFLAGS+=-Wl,-T,$(SRC_PATH)/x86_64.ld
endif
ifeq ($(ARCH),ppc)
-CFLAGS+= -D__powerpc__
-OP_CFLAGS=$(CFLAGS)
+CFLAGS += -D__powerpc__
LDFLAGS+=-Wl,-T,$(SRC_PATH)/ppc.ld
endif
ifeq ($(ARCH),s390)
-OP_CFLAGS=$(CFLAGS)
LDFLAGS+=-Wl,-T,$(SRC_PATH)/s390.ld
endif
ifeq ($(ARCH),sparc)
-CFLAGS+=-m32 -ffixed-g1 -ffixed-g2 -ffixed-g3 -ffixed-g6
-LDFLAGS+=-m32
-OP_CFLAGS=$(CFLAGS) -fno-delayed-branch -ffixed-i0
-HELPER_CFLAGS=$(CFLAGS) -ffixed-i0 -mflat
+CFLAGS += -m32 -ffixed-g1 -ffixed-g2 -ffixed-g3 -ffixed-g6
+LDFLAGS += -m32
+OP_CFLAGS += -m32 -ffixed-g1 -ffixed-g2 -ffixed-g3 -ffixed-g6 \
+ -fno-delayed-branch -ffixed-i0
+HELPER_CFLAGS = $(CFLAGS) -ffixed-i0 -mflat
# -static is used to avoid g1/g3 usage by the dynamic linker
LDFLAGS+=-Wl,-T,$(SRC_PATH)/sparc.ld -static
endif
ifeq ($(ARCH),sparc64)
-CFLAGS+=-m64 -ffixed-g1 -ffixed-g2 -ffixed-g3 -ffixed-g6
-LDFLAGS+=-m64
-OP_CFLAGS=$(CFLAGS) -fno-delayed-branch -ffixed-i0
+CFLAGS += -m64 -ffixed-g1 -ffixed-g2 -ffixed-g3 -ffixed-g6
+LDFLAGS += -m64
+OP_CFLAGS += -m64 -ffixed-g1 -ffixed-g2 -ffixed-g3 -ffixed-g6 \
+ -fno-delayed-branch -ffixed-i0
endif
ifeq ($(ARCH),alpha)
-# -msmall-data is not used because we want two-instruction relocations
-# for the constant constructions
-OP_CFLAGS=-Wall -O2 -g
# Ensure there's only a single GP
CFLAGS += -msmall-data
+# -msmall-data is not used for OP_CFLAGS because we want
+# two-instruction relocations for the constant constructions
LDFLAGS+=-Wl,-T,$(SRC_PATH)/alpha.ld
endif
ifeq ($(ARCH),ia64)
CFLAGS += -mno-sdata
-OP_CFLAGS=$(CFLAGS)
+OP_CFLAGS += -mno-sdata
LDFLAGS+=-Wl,-G0 -Wl,-T,$(SRC_PATH)/ia64.ld
endif
ifeq ($(ARCH),arm)
-OP_CFLAGS=$(CFLAGS) -mno-sched-prolog -fno-omit-frame-pointer
+OP_CFLAGS += -mno-sched-prolog -fno-omit-frame-pointer
LDFLAGS+=-Wl,-T,$(SRC_PATH)/arm.ld
endif
ifeq ($(ARCH),m68k)
-OP_CFLAGS=$(CFLAGS) -fomit-frame-pointer
-LDFLAGS+=-Wl,-T,m68k.ld
+OP_CFLAGS += -fomit-frame-pointer
+LDFLAGS+=-Wl,-T,$(SRC_PATH)/m68k.ld
endif
-ifeq ($(HAVE_GCC3_OPTIONS),yes)
-# very important to generate a return at the end of every operation
-OP_CFLAGS+=-fno-reorder-blocks -fno-optimize-sibling-calls
+ifeq ($(ARCH),mips)
+LDFLAGS+=-Wl,-T,$(SRC_PATH)/mips.ld
endif
ifeq ($(CONFIG_DARWIN),yes)
Index: configure
===================================================================
--- configure.orig 2006-03-28 15:05:19.000000000 +0100
+++ configure 2006-03-28 15:05:45.000000000 +0100
@@ -291,34 +291,6 @@
hostlongbits="64"
fi
-# check gcc options support
-cat > $TMPC <<EOF
-int main(void) {
-}
-EOF
-
-have_gcc3_options="no"
-if $cc -fno-reorder-blocks -fno-optimize-sibling-calls -o $TMPO $TMPC 2> /dev/null ; then
- have_gcc3_options="yes"
-fi
-
-# Check for gcc4
-if test "$check_gcc" = "yes" ; then
- cat > $TMPC <<EOF
-#if __GNUC__ >= 4
-#error gcc4
-#endif
-int main(){return 0;}
-EOF
- if ! $cc -o $TMPO $TMPC 2>/dev/null ; then
- echo "ERROR: \"$cc\" looks like gcc 4.x"
- echo "QEMU is known to have problems when compiled with gcc 4.x"
- echo "It is recommended that you use gcc 3.x to build QEMU"
- echo "To use this compiler anyway, configure with --disable-gcc-check"
- exit 1;
- fi
-fi
-
##########################################
# SDL probe
@@ -409,7 +381,7 @@
echo " --fmod-lib path to FMOD library"
echo " --fmod-inc path to FMOD includes"
echo ""
-echo "NOTE: The object files are build at the place where configure is launched"
+echo "NOTE: The object files are built at the place where configure is launched"
exit 1
fi
@@ -498,9 +470,6 @@
echo "#define CONFIG_QEMU_SHAREDIR \"$datadir\"" >> $config_h
echo "MAKE=$make" >> $config_mak
echo "CC=$cc" >> $config_mak
-if test "$have_gcc3_options" = "yes" ; then
- echo "HAVE_GCC3_OPTIONS=yes" >> $config_mak
-fi
echo "HOST_CC=$host_cc" >> $config_mak
echo "AR=$ar" >> $config_mak
echo "STRIP=$strip -s -R .comment -R .note" >> $config_mak
Index: dyngen-exec.h
===================================================================
--- dyngen-exec.h.orig 2006-03-28 15:05:19.000000000 +0100
+++ dyngen-exec.h 2006-03-28 15:05:45.000000000 +0100
@@ -155,7 +155,7 @@
#endif
/* force GCC to generate only one epilog at the end of the function */
-#define FORCE_RET() asm volatile ("");
+#define FORCE_RET() __asm__ __volatile__("" : : : "memory");
#ifndef OPPROTO
#define OPPROTO
Index: ppc.ld
===================================================================
--- ppc.ld.orig 2006-03-28 15:05:19.000000000 +0100
+++ ppc.ld 2006-03-28 15:05:45.000000000 +0100
@@ -2,8 +2,8 @@
* Written by Martin Mares <mj@atrey.karlin.mff.cuni.cz>;
*/
OUTPUT_FORMAT("elf32-powerpc", "elf32-powerpc", "elf32-powerpc")
-OUTPUT_ARCH(powerpc)
-SEARCH_DIR(/lib); SEARCH_DIR(/usr/lib); SEARCH_DIR(/usr/local/lib); SEARCH_DIR(/usr/alpha-unknown-linux-gnu/lib);
+OUTPUT_ARCH(powerpc:common)
+SEARCH_DIR(/usr/powerpc-linux-gnu/lib); SEARCH_DIR(/usr/local/lib); SEARCH_DIR(/lib); SEARCH_DIR(/usr/lib)
ENTRY(_start)
SECTIONS
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__bss_start = .;
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+ .sbss :
+ {
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+ *(.scommon)
+ PROVIDE (__sbss_end = .); PROVIDE (___sbss_end = .);
+ }
+ .plt : SPECIAL { *(.plt) }
+ .bss :
{
*(.dynbss)
- *(.bss)
+ *(.bss .bss.* .gnu.linkonce.b.*)
*(COMMON)
+ /* Align here to ensure that the .bss section occupies space up to
+ _end. Align after .bss to ensure correct alignment even if the
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}
- _end = . ;
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/* Stabs debugging sections. */
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@@ -137,4 +223,6 @@
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/* These must appear regardless of . */
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}
Index: target-mips/exec.h
===================================================================
--- target-mips/exec.h.orig 2006-03-28 15:05:19.000000000 +0100
+++ target-mips/exec.h 2006-03-28 15:05:45.000000000 +0100
@@ -31,9 +31,9 @@
#endif
#if defined (DEBUG_OP)
-#define RETURN() __asm__ __volatile__("nop");
+# define RETURN() __asm__ __volatile__("nop" : : : "memory");
#else
-#define RETURN() __asm__ __volatile__("");
+# define RETURN() __asm__ __volatile__("" : : : "memory");
#endif
#include "cpu.h"
Index: target-ppc/exec.h
===================================================================
--- target-ppc/exec.h.orig 2006-03-28 15:05:19.000000000 +0100
+++ target-ppc/exec.h 2006-03-28 15:05:45.000000000 +0100
@@ -38,9 +38,9 @@
#define FT2 (env->ft2)
#if defined (DEBUG_OP)
-#define RETURN() __asm__ __volatile__("nop");
+#define RETURN() __asm__ __volatile__("nop" : : : "memory");
#else
-#define RETURN() __asm__ __volatile__("");
+#define RETURN() __asm__ __volatile__("" : : : "memory");
#endif
#include "cpu.h"
Index: mips.ld
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ mips.ld 2006-03-28 15:05:45.000000000 +0100
@@ -0,0 +1,225 @@
+/* Default linker script, for normal executables */
+OUTPUT_FORMAT("elf32-tradbigmips", "elf32-tradbigmips",
+ "elf32-tradlittlemips")
+OUTPUT_ARCH(mips)
+ENTRY(__start)
+SEARCH_DIR("/usr/mips-linux-gnu/lib");
+SECTIONS
+{
+ /* Read-only sections, merged into text segment: */
+ PROVIDE (__executable_start = 0x0400000); . = 0x0400000 + SIZEOF_HEADERS;
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Index: mipsel.ld
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ mipsel.ld 2006-03-28 15:05:45.000000000 +0100
@@ -0,0 +1,225 @@
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+ /DISCARD/ : { *(.note.GNU-stack) }
+}
^ permalink raw reply [flat|nested] 16+ messages in thread* Re: [Qemu-devel] [PATCH] Add gcc 4.0 support
2006-03-28 14:09 ` Thiemo Seufer
@ 2006-03-29 4:26 ` John Davidorff Pell
2006-03-29 9:59 ` Thiemo Seufer
2006-04-03 15:42 ` Dirk Behme
1 sibling, 1 reply; 16+ messages in thread
From: John Davidorff Pell @ 2006-03-29 4:26 UTC (permalink / raw)
To: qemu-devel
Out of curiosity, wouldn't it be better to specifically request that
feature of gcc, with one of its myriad options, rather than forcing a
rather large optimization sweep? I'm sure that -O2 is good generally,
but using it as a kludge to get at one of the many things that it
enables seems like a not-so-great-idea. Its like buying a restaurant
so that you can get a chef's stove.
Please feel free to ignore me completely if you like, this is just my
$0.02. :-)
JP
On 28 Mar 2006, at 06:09, Thiemo Seufer wrote:
> +# We require -O2 to avoid the stack setup prologue in EXIT_TB
--
"Faith: Belief without evidence in what is told by one who speaks
without knowledge, of things without parallel." - A.B.
^ permalink raw reply [flat|nested] 16+ messages in thread
* Re: [Qemu-devel] [PATCH] Add gcc 4.0 support
2006-03-29 4:26 ` John Davidorff Pell
@ 2006-03-29 9:59 ` Thiemo Seufer
2006-03-29 17:03 ` John Davidorff Pell
0 siblings, 1 reply; 16+ messages in thread
From: Thiemo Seufer @ 2006-03-29 9:59 UTC (permalink / raw)
To: qemu-devel
On Tue, Mar 28, 2006 at 08:26:27PM -0800, John Davidorff Pell wrote:
> Out of curiosity, wouldn't it be better to specifically request that
> feature of gcc, with one of its myriad options, rather than forcing a
> rather large optimization sweep? I'm sure that -O2 is good generally,
> but using it as a kludge to get at one of the many things that it
> enables seems like a not-so-great-idea. Its like buying a restaurant
> so that you can get a chef's stove.
Well, I went through the ppc disassembly and found no reason to
disable -O2. Note that it was the default before, I only noticed
the breakage when I lowered the global optimisation to -O0 for better
debugging.
Thiemo
^ permalink raw reply [flat|nested] 16+ messages in thread
* Re: [Qemu-devel] [PATCH] Add gcc 4.0 support
2006-03-29 9:59 ` Thiemo Seufer
@ 2006-03-29 17:03 ` John Davidorff Pell
2006-03-29 19:24 ` Pascal Terjan
2006-03-29 19:33 ` Paul Brook
0 siblings, 2 replies; 16+ messages in thread
From: John Davidorff Pell @ 2006-03-29 17:03 UTC (permalink / raw)
To: qemu-devel
I was just thinking that by enabling the required feature
individually, someone else could choose -O0 and not have to
investigate why it fails. Its not like its a big deal, though. :-)
JP
P.S. Why does the list set the reply-to header, isn't that supposed
to be a Bad Thing™?
On 29 Mar 2006, at 01:59, Thiemo Seufer wrote:
> On Tue, Mar 28, 2006 at 08:26:27PM -0800, John Davidorff Pell wrote:
>> Out of curiosity, wouldn't it be better to specifically request that
>> feature of gcc, with one of its myriad options, rather than forcing a
>> rather large optimization sweep? I'm sure that -O2 is good generally,
>> but using it as a kludge to get at one of the many things that it
>> enables seems like a not-so-great-idea. Its like buying a restaurant
>> so that you can get a chef's stove.
>
> Well, I went through the ppc disassembly and found no reason to
> disable -O2. Note that it was the default before, I only noticed
> the breakage when I lowered the global optimisation to -O0 for better
> debugging.
>
>
> Thiemo
>
>
> _______________________________________________
> Qemu-devel mailing list
> Qemu-devel@nongnu.org
> http://lists.nongnu.org/mailman/listinfo/qemu-devel
--
Blood is thicker than water... and much tastier.
^ permalink raw reply [flat|nested] 16+ messages in thread
* Re: [Qemu-devel] [PATCH] Add gcc 4.0 support
2006-03-29 17:03 ` John Davidorff Pell
@ 2006-03-29 19:24 ` Pascal Terjan
2006-03-29 19:37 ` sofar
2006-03-29 21:03 ` [Off Topic] " Jim C. Brown
2006-03-29 19:33 ` Paul Brook
1 sibling, 2 replies; 16+ messages in thread
From: Pascal Terjan @ 2006-03-29 19:24 UTC (permalink / raw)
To: qemu-devel
On 3/29/06, John Davidorff Pell <jpell.lists@mac.com> wrote:
> P.S. Why does the list set the reply-to header, isn't that supposed
> to be a Bad Thing™?
Only according to some people :)
I hate when I reply to a list and the message goes to the guy and not
to the list... (If someone enforces Reply-To in his mail I think
however that it should remain).
^ permalink raw reply [flat|nested] 16+ messages in thread
* Re: [Qemu-devel] [PATCH] Add gcc 4.0 support
2006-03-29 19:24 ` Pascal Terjan
@ 2006-03-29 19:37 ` sofar
2006-03-29 21:21 ` [Off Topic again] " Jim C. Brown
2006-03-29 21:03 ` [Off Topic] " Jim C. Brown
1 sibling, 1 reply; 16+ messages in thread
From: sofar @ 2006-03-29 19:37 UTC (permalink / raw)
To: qemu-devel
On Wed, 29 Mar 2006 21:24:59 +0200, "Pascal Terjan" <pterjan@gmail.com> wrote:
> On 3/29/06, John Davidorff Pell <jpell.lists@mac.com> wrote:
>> P.S. Why does the list set the reply-to header, isn't that supposed
>> to be a Bad Thing™?
>
> Only according to some people :)
> I hate when I reply to a list and the message goes to the guy and not
> to the list... (If someone enforces Reply-To in his mail I think
> however that it should remain).
I kind of like it and wish that some lists would allow me to set it as a user-preference - there are so many lists and I really never ever want to reply to *just* the person (ever, ever, ever).
reply-to the list is good for me
Auke
^ permalink raw reply [flat|nested] 16+ messages in thread
* [Off Topic again] Re: [Qemu-devel] [PATCH] Add gcc 4.0 support
2006-03-29 19:37 ` sofar
@ 2006-03-29 21:21 ` Jim C. Brown
0 siblings, 0 replies; 16+ messages in thread
From: Jim C. Brown @ 2006-03-29 21:21 UTC (permalink / raw)
To: qemu-devel
On Wed, Mar 29, 2006 at 07:37:50PM +0000, sofar wrote:
>
> I kind of like it and wish that some lists would allow me to set it as a user-preference - there are so many lists and I really never ever want to reply to *just* the person (ever, ever, ever).
>
> reply-to the list is good for me
>
> Auke
>
Actually, I'm for making it a user preference. This might be difficult to
implement in the mailing list software but is IMVHO a worthwhile addition.
That way users who find mangled mails convient can get what they want without
having to compromise the rest of us (sane) users..
Of course there are those who will say that this should be a mail client option,
not a mailing list problem.
Well, here is what I have to do to work around mailing lists of both types
(those that do mangle and those that don't):
reply command (looks at From: and ignores Reply-To: - necessary to reply just to
the person if the list does reply-to mangling)
reply-to-reply command (uses Reply-To: - I have never actually used this for
anything ;) but it is there for those cases such as when I get an individual
email that has a Reply-To: on it for whatever reason)
reply-to-replied command (looks at the To: header, this is a bit counterintutive
but provides an easy way to reply directly to the list when the list does not
do reply-to mangling)
reply-to-group (replies to everyone in the To: and Cc: and etc.. - generally
avoided as it often results in duplicate mails)
reply-to-list (replies to the mailing list as defined in a config file - this
is for those corner cases where I want to reply to only the list but the list
is in the Cc: or something - this is rare)
Some food for thought. How many people think adding all these options to all
e-mail clients is a good idea? :)
--
Infinite complexity begets infinite beauty.
Infinite precision begets infinite perfection.
^ permalink raw reply [flat|nested] 16+ messages in thread
* [Off Topic] Re: [Qemu-devel] [PATCH] Add gcc 4.0 support
2006-03-29 19:24 ` Pascal Terjan
2006-03-29 19:37 ` sofar
@ 2006-03-29 21:03 ` Jim C. Brown
1 sibling, 0 replies; 16+ messages in thread
From: Jim C. Brown @ 2006-03-29 21:03 UTC (permalink / raw)
To: qemu-devel
On Wed, Mar 29, 2006 at 09:24:59PM +0200, Pascal Terjan wrote:
> On 3/29/06, John Davidorff Pell <jpell.lists@mac.com> wrote:
> > P.S. Why does the list set the reply-to header, isn't that supposed
> > to be a Bad Thing??
>
> Only according to some people :)
> I hate when I reply to a list and the message goes to the guy and not
> to the list... (If someone enforces Reply-To in his mail I think
> however that it should remain).
>
Thats the fault of a badly configured mail client.
I personally dislike Reply-To mailing lists, but I fixed my mail client (mutt)
so it doesn't matter as much.
The reason I dislike Reply-To mailing lists - it is generally better to
accidently send a list mail to one person than to send a one-person mail to the
list. (But again I fixed my client so this doesn't affect me so much.)
--
Infinite complexity begets infinite beauty.
Infinite precision begets infinite perfection.
^ permalink raw reply [flat|nested] 16+ messages in thread
* Re: [Qemu-devel] [PATCH] Add gcc 4.0 support
2006-03-29 17:03 ` John Davidorff Pell
2006-03-29 19:24 ` Pascal Terjan
@ 2006-03-29 19:33 ` Paul Brook
2006-03-31 23:18 ` John Davidorff Pell
1 sibling, 1 reply; 16+ messages in thread
From: Paul Brook @ 2006-03-29 19:33 UTC (permalink / raw)
To: qemu-devel
On Wednesday 29 March 2006 18:03, John Davidorff Pell wrote:
> I was just thinking that by enabling the required feature
> individually, someone else could choose -O0 and not have to
> investigate why it fails. Its not like its a big deal, though. :-)
Like most things dyngen relies on this isn't a feature as such. There's no gcc
option that says "make sure this function doesn't have a stack frame".
It just happens that at with optimisation turned on this is generally true.
Also, the gcc -O2 option is more than the sum of the other options it enables.
Paul
^ permalink raw reply [flat|nested] 16+ messages in thread
* Re: [Qemu-devel] [PATCH] Add gcc 4.0 support
2006-03-29 19:33 ` Paul Brook
@ 2006-03-31 23:18 ` John Davidorff Pell
0 siblings, 0 replies; 16+ messages in thread
From: John Davidorff Pell @ 2006-03-31 23:18 UTC (permalink / raw)
To: Paul Brook; +Cc: qemu-devel
On 29 Mar 2006, at 11:33, Paul Brook wrote:
> Also, the gcc -O2 option is more than the sum of the other options
> it enables.
That, IMHO, is a bug. Of course, its not Qemu's bug. :-)
JP
--
"The New York Times is read by the people who run the country. The
Washington Post is read by the people who think they run the country.
The National Enquirer is read by the people who think Elvis is alive
and running the country ..."
-- Robert J Woodhead
^ permalink raw reply [flat|nested] 16+ messages in thread
* Re: [Qemu-devel] [PATCH] Add gcc 4.0 support
2006-03-28 14:09 ` Thiemo Seufer
2006-03-29 4:26 ` John Davidorff Pell
@ 2006-04-03 15:42 ` Dirk Behme
2006-04-03 15:50 ` Jim C. Brown
1 sibling, 1 reply; 16+ messages in thread
From: Dirk Behme @ 2006-04-03 15:42 UTC (permalink / raw)
To: qemu-devel, Thiemo Seufer
Thiemo Seufer wrote:
> Updated version, note that this is still not suitable for CVS since
> x86 fails to build with it.
fyi: for me, arm-softmmu fails as well:
.../qemu/qemu-snapshot-2006-03-30_23/target-arm/op.c
gcc: unrecognized option '-preferred-stack-boundary=2'
/qemu/qemu-snapshot-2006-03-30_23/target-arm/op_mem.h: In
function ‘op_vfp_std_kernel’:
/qemu/qemu-snapshot-2006-03-30_23/target-arm/op_mem.h:66:
error: unable to find a register to spill in class
‘GENERAL_REGS’
/qemu/qemu-snapshot-2006-03-30_23/target-arm/op_mem.h:66:
error: this is the insn:
(insn:HI 44 43 45 2
/qemu/qemu-snapshot-2006-03-30_23/cpu-all.h:342 (set (mem:DI
(plus:SI (reg/v:SI 59 [ addr ])
(reg:SI 73 [ <variable>.addend ])) [0 S8 A64])
(reg:DI 63 [ <variable>.vfp.tmp0d ])) 57 {*movdi_2}
(insn_list:REG_DEP_TRUE 43 (nil))
(expr_list:REG_DEAD (reg:DI 63 [ <variable>.vfp.tmp0d ])
(expr_list:REG_DEAD (reg/v:SI 59 [ addr ])
(expr_list:REG_DEAD (reg:SI 73 [
<variable>.addend ])
(nil)))))
/qemu/qemu-snapshot-2006-03-30_23/target-arm/op_mem.h:66:
confused by earlier errors, bailing out
make[1]: *** [op.o] Error 1
make[1]: Leaving directory
`/qemu/qemu-snapshot-2006-03-30_23/arm-softmmu'
make: *** [all] Error 1
> gcc -v
...
gcc version 4.0.2 20050901 (prerelease) (SUSE Linux)
Dirk
^ permalink raw reply [flat|nested] 16+ messages in thread* Re: [Qemu-devel] [PATCH] Add gcc 4.0 support
2006-04-03 15:42 ` Dirk Behme
@ 2006-04-03 15:50 ` Jim C. Brown
0 siblings, 0 replies; 16+ messages in thread
From: Jim C. Brown @ 2006-04-03 15:50 UTC (permalink / raw)
To: qemu-devel
On Mon, Apr 03, 2006 at 05:42:22PM +0200, Dirk Behme wrote:
> Thiemo Seufer wrote:
> >Updated version, note that this is still not suitable for CVS since
> >x86 fails to build with it.
>
> fyi: for me, arm-softmmu fails as well:
>
By x86, he probably means x86 hosts, not x86-softmmu
All targets (softmmu and user) would fail on x86 hosts. And possibly other hosts as well.
> Dirk
>
--
Infinite complexity begets infinite beauty.
Infinite precision begets infinite perfection.
^ permalink raw reply [flat|nested] 16+ messages in thread
end of thread, other threads:[~2006-04-03 15:50 UTC | newest]
Thread overview: 16+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2006-02-15 12:25 [Qemu-devel] [PATCH] Add gcc 4.0 support Thiemo Seufer
2006-02-15 16:20 ` Johannes Schindelin
2006-02-15 19:10 ` Thiemo Seufer
2006-02-15 22:04 ` Johannes Schindelin
2006-03-28 14:09 ` Thiemo Seufer
2006-03-29 4:26 ` John Davidorff Pell
2006-03-29 9:59 ` Thiemo Seufer
2006-03-29 17:03 ` John Davidorff Pell
2006-03-29 19:24 ` Pascal Terjan
2006-03-29 19:37 ` sofar
2006-03-29 21:21 ` [Off Topic again] " Jim C. Brown
2006-03-29 21:03 ` [Off Topic] " Jim C. Brown
2006-03-29 19:33 ` Paul Brook
2006-03-31 23:18 ` John Davidorff Pell
2006-04-03 15:42 ` Dirk Behme
2006-04-03 15:50 ` Jim C. Brown
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