[PATCH v1 12/51] configure: do not invoke as/ld directly for pc-bios/optionrom

["Alex Bennée" <alex.bennee@linaro.org>]

From: Paolo Bonzini <pbonzini@redhat.com>

Just use using the compiler binary, with -nostdlib in the case of the
linker; the compiler driver (whether i686-*-gcc, or x86_64-*-gcc with
the -m32 option) will then pick the right magic option to as and ld.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
 configure                  | 22 +++++-----------------
 pc-bios/optionrom/Makefile | 12 ++++--------
 2 files changed, 9 insertions(+), 25 deletions(-)

diff --git a/configure b/configure
index 52ae4adffc..aaa09fb957 100755
--- a/configure
+++ b/configure
@@ -2298,23 +2298,11 @@ probe_target_compiler i386-softmmu
 if test -n "$target_cc" &&
         test "$targetos" != "darwin" && test "$targetos" != "sunos" && \
         test "$targetos" != "haiku" && test "$softmmu" = yes ; then
-    # Different host OS linkers have different ideas about the name of the ELF
-    # emulation. Linux and OpenBSD/amd64 use 'elf_i386'; FreeBSD uses the _fbsd
-    # variant; OpenBSD/i386 uses the _obsd variant; and Windows uses i386pe.
-    for emu in elf_i386 elf_i386_fbsd elf_i386_obsd i386pe; do
-        if "$target_ld" -verbose 2>&1 | grep -q "^[[:space:]]*${emu}[[:space:]]*$"; then
-            ld_i386_emulation="$emu"
-            break
-        fi
-    done
-    if test -n "$ld_i386_emulation"; then
-        roms="pc-bios/optionrom"
-        config_mak=pc-bios/optionrom/config.mak
-        echo "# Automatically generated by configure - do not modify" > $config_mak
-        echo "TOPSRC_DIR=$source_path" >> $config_mak
-        echo "LD_I386_EMULATION=$ld_i386_emulation" >> $config_mak
-        write_target_makefile >> $config_mak
-    fi
+    roms="pc-bios/optionrom"
+    config_mak=pc-bios/optionrom/config.mak
+    echo "# Automatically generated by configure - do not modify" > $config_mak
+    echo "TOPSRC_DIR=$source_path" >> $config_mak
+    write_target_makefile >> $config_mak
 fi
 
 probe_target_compiler ppc-softmmu
diff --git a/pc-bios/optionrom/Makefile b/pc-bios/optionrom/Makefile
index e90ca2e1c6..3e06c11dea 100644
--- a/pc-bios/optionrom/Makefile
+++ b/pc-bios/optionrom/Makefile
@@ -20,28 +20,24 @@ override CFLAGS += $(call cc-option, -fcf-protection=none)
 # Flags for dependency generation
 override CPPFLAGS += -MMD -MP -MT $@ -MF $(@D)/$(*F).d
 
-override CFLAGS += $(filter -W%, $(QEMU_CFLAGS))
 override CFLAGS += $(call cc-option, -fno-pie)
+override CFLAGS += $(call cc-option, -no-pie)
 override CFLAGS += -ffreestanding -I$(TOPSRC_DIR)/include
 override CFLAGS += $(call cc-option, -fno-stack-protector)
 override CFLAGS += $(call cc-option, -Wno-array-bounds)
 
-Wa = -Wa,
-override ASFLAGS += -32
-override CFLAGS += $(call cc-option, $(Wa)-32)
-
-override LDFLAGS = -m $(LD_I386_EMULATION) -T $(SRC_DIR)/flat.lds
+override LDFLAGS = -nostdlib -Wl,-T,$(SRC_DIR)/flat.lds
 
 pvh.img: pvh.o pvh_main.o
 
 %.o: %.S
-	$(call quiet-command,$(CC) $(CPPFLAGS) -E -o - $< | $(AS) $(ASFLAGS) -o $@,"AS","$@")
+	$(call quiet-command,$(CC) $(CPPFLAGS) $(CFLAGS) -c -o $@ $<,"AS","$@")
 
 %.o: %.c
 	$(call quiet-command,$(CC) $(CPPFLAGS) $(CFLAGS) -c $< -o $@,"CC","$@")
 
 %.img: %.o
-	$(call quiet-command,$(LD) $(LDFLAGS) -s -o $@ $^,"BUILD","$@")
+	$(call quiet-command,$(CC) $(CFLAGS) $(LDFLAGS) -s -o $@ $^,"BUILD","$@")
 
 %.raw: %.img
 	$(call quiet-command,$(OBJCOPY) -O binary -j .text $< $@,"BUILD","$@")
-- 
2.34.1