[stalld v2 0/6] Improve Makefile portability and debugging

[stalld v2 0/6] Improve Makefile portability and debugging

[Wander Lairson Costa]

This patch series improves the stalld build system to be more portable
across different architectures and compiler toolchains while adding
better debugging capabilities. The main motivation is to eliminate
hard-coded compiler version checks that were brittle and could fail on
non-standard toolchains or different architectures.

The changes replace minimum version checks with direct compiler feature
detection tests, ensuring that compiler flags are only used when
actually supported. This approach tests each flag by attempting to
compile a minimal test program, making the build system resilient to
variations in compiler implementations across architectures like x86_64,
aarch64, s390x, i686, and powerpc. Additionally, the series adds build
environment information output and cleans up redundant checks to improve
maintainability.

The series also includes minor improvements to explicitly specify the
test target invocation and exclude development environment metadata from
version control.

Wander Lairson Costa (6):
  Makefile: Conditionally add -mno-omit-leaf-frame-pointer
  Makefile: Improve compiler flag detection for -fcf-protection
  Makefile: Explicitly run the 'test' target in the tests directory
  Makefile: Remove redundant GCC version check
  Makefile: Print BPF tool versions for debugging
  gitignore: Exclude Serena and Claude Code metadata

 .gitignore |  2 ++
 Makefile   | 42 ++++++++++++++++++++++++------------------
 2 files changed, 26 insertions(+), 18 deletions(-)

Signed-off-by: Wander Lairson Costa <wander@redhat.com>
Cc: Derek Barbosa <debarbos@redhat.com>
Cc: John Kacur <jkacur@redhat.com>
Cc: Juri Lelli <juri.lelli@redhat.com>
Cc: Chunsheng Luo <luochunsheng@ustc.edu>
---

-- 
2.51.1

[stalld v2 1/6] Makefile: Conditionally add -mno-omit-leaf-frame-pointer

[Wander Lairson Costa]

The -mno-omit-leaf-frame-pointer option is not available on all
architectures (e.g., s390x) or with older compiler versions. To avoid
compilation errors on such systems, this change adds a check to ensure
the option is only used when the compiler supports it.

This approach is similar to the existing check for -fcf-protection.

Signed-off-by: Wander Lairson Costa <wander@redhat.com>
Cc: Derek Barbosa <debarbos@redhat.com>
Cc: John Kacur <jkacur@redhat.com>
Cc: Juri Lelli <juri.lelli@redhat.com>
Cc: Chunsheng Luo <luochunsheng@ustc.edu>
---
 Makefile | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index c19e0bd..d605e60 100644
--- a/Makefile
+++ b/Makefile
@@ -60,7 +60,13 @@ FOPTS	:=	-flto=auto -ffat-lto-objects -fexceptions -fstack-protector-strong \
 		-fasynchronous-unwind-tables -fstack-clash-protection -fno-omit-frame-pointer \
 		$(strip $(FCF_PROTECTION)) -fpie
 
-MOPTS   :=  	$(strip $(MTUNE)) $(strip $(M64)) -mno-omit-leaf-frame-pointer
+# Test if compiler supports -mno-omit-leaf-frame-pointer
+OMIT_LEAF_FP := $(shell echo 'int main(void){return 0;}' | \
+		$(CC) -x c -mno-omit-leaf-frame-pointer - \
+		-o /dev/null 2>/dev/null && \
+		echo '-mno-omit-leaf-frame-pointer')
+
+MOPTS   :=  	$(strip $(MTUNE)) $(strip $(M64)) $(strip $(OMIT_LEAF_FP))
 
 WOPTS	:= 	-Wall -Werror=format-security
 
-- 
2.51.1

Re: [stalld v2 1/6] Makefile: Conditionally add -mno-omit-leaf-frame-pointer

[Clark Williams]

On Mon, Nov 10, 2025 at 10:22:36AM -0300, Wander Lairson Costa wrote:
> The -mno-omit-leaf-frame-pointer option is not available on all
> architectures (e.g., s390x) or with older compiler versions. To avoid
> compilation errors on such systems, this change adds a check to ensure
> the option is only used when the compiler supports it.
> 
> This approach is similar to the existing check for -fcf-protection.
> 
> Signed-off-by: Wander Lairson Costa <wander@redhat.com>
> Cc: Derek Barbosa <debarbos@redhat.com>
> Cc: John Kacur <jkacur@redhat.com>
> Cc: Juri Lelli <juri.lelli@redhat.com>
> Cc: Chunsheng Luo <luochunsheng@ustc.edu>
> ---
>  Makefile | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)
> 
> diff --git a/Makefile b/Makefile
> index c19e0bd..d605e60 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -60,7 +60,13 @@ FOPTS	:=	-flto=auto -ffat-lto-objects -fexceptions -fstack-protector-strong \
>  		-fasynchronous-unwind-tables -fstack-clash-protection -fno-omit-frame-pointer \
>  		$(strip $(FCF_PROTECTION)) -fpie
>  
> -MOPTS   :=  	$(strip $(MTUNE)) $(strip $(M64)) -mno-omit-leaf-frame-pointer
> +# Test if compiler supports -mno-omit-leaf-frame-pointer
> +OMIT_LEAF_FP := $(shell echo 'int main(void){return 0;}' | \
> +		$(CC) -x c -mno-omit-leaf-frame-pointer - \
> +		-o /dev/null 2>/dev/null && \
> +		echo '-mno-omit-leaf-frame-pointer')
> +
> +MOPTS   :=  	$(strip $(MTUNE)) $(strip $(M64)) $(strip $(OMIT_LEAF_FP))
>  
>  WOPTS	:= 	-Wall -Werror=format-security
>  
> -- 
> 2.51.1
> 
Signed-off-by: Clark Williams <williams@redhat.com>
-- 
The United States Coast Guard
Ruining Natural Selection since 1790

[stalld v2 2/6] Makefile: Improve compiler flag detection for -fcf-protection

[Wander Lairson Costa]

The previous method of detecting support for -fcf-protection relied on
a minimum GCC version check, which was not always accurate and could
fail on different architectures or compiler toolchains.

This commit replaces the version check with a more robust method that
directly tests if the compiler supports the -fcf-protection flag. This
ensures better portability and avoids compilation errors on systems
where the flag is not available.

This change mirrors the recently added detection logic for the
-mno-omit-leaf-frame-pointer flag.

Signed-off-by: Wander Lairson Costa <wander@redhat.com>
Cc: Derek Barbosa <debarbos@redhat.com>
Cc: John Kacur <jkacur@redhat.com>
Cc: Juri Lelli <juri.lelli@redhat.com>
Cc: Chunsheng Luo <luochunsheng@ustc.edu>
---
 Makefile | 23 ++++++++++++-----------
 1 file changed, 12 insertions(+), 11 deletions(-)

diff --git a/Makefile b/Makefile
index d605e60..23e786d 100644
--- a/Makefile
+++ b/Makefile
@@ -20,17 +20,14 @@ IS_MINVER := $(intcmp $(GCC_VER), $(MIN_GCC_VER), false, true, true)
 $(info IS_MINVER=$(IS_MINVER))
 
 USE_BPF := 1
-FCF_PROTECTION := -fcf-protection
 MTUNE	:= -mtune=generic
 M64	:= -m64
 
 ifeq ($(ARCH),aarch64)
-FCF_PROTECTION := "-fcf-protection=none"
 M64	:=
 endif
 ifeq ($(ARCH),i686)
 USE_BPF := 0
-FCF_PROTECTION := "-fcf-protection=branch"
 endif
 ifeq ($(ARCH),s390x)
 MTUNE := -mtune=z13
@@ -43,23 +40,23 @@ ifeq ($(ARCH),powerpc)
 USE_BPF := 0
 MTUNE := -mtune=powerpc
 endif
-ifeq ($(strip $(IS_MINVER)), false)
-FCF_PROTECTION := 
-endif
-
-
-$(info USE_BPF=$(USE_BPF))
-$(info FCF_PROTECTION=$(FCF_PROTECTION))
-$(info MTUNE=$(MTUNE))
 
 DEBUG	?=	0
 
 INSTALL	=	install
 CC	:=	gcc
+
+# Test if compiler supports -fcf-protection
+FCF_PROTECTION := $(shell echo 'int main(void){return 0;}' | \
+		$(CC) -x c -fcf-protection - \
+		-o /dev/null 2>/dev/null && \
+		echo '-fcf-protection')
+
 FOPTS	:=	-flto=auto -ffat-lto-objects -fexceptions -fstack-protector-strong \
 		-fasynchronous-unwind-tables -fstack-clash-protection -fno-omit-frame-pointer \
 		$(strip $(FCF_PROTECTION)) -fpie
 
+
 # Test if compiler supports -mno-omit-leaf-frame-pointer
 OMIT_LEAF_FP := $(shell echo 'int main(void){return 0;}' | \
 		$(CC) -x c -mno-omit-leaf-frame-pointer - \
@@ -74,6 +71,10 @@ DEFS	:=	-DUSE_BPF=$(USE_BPF) -D_FORTIFY_SOURCE=3 -D_GLIBCXX_ASSERTIONS -DDEBUG_S
 
 CFLAGS	:=      -DVERSION=\"$(VERSION)\" $(FOPTS) $(MOPTS) $(WOPTS) $(DEFS)
 
+$(info USE_BPF=$(USE_BPF))
+$(info FCF_PROTECTION=$(FCF_PROTECTION))
+$(info MTUNE=$(MTUNE))
+
 ifeq ($(DEBUG),0)
 CFLAGS	+=	-g -O2
 else
-- 
2.51.1

Re: [stalld v2 2/6] Makefile: Improve compiler flag detection for -fcf-protection

[Clark Williams]

On Mon, Nov 10, 2025 at 10:22:37AM -0300, Wander Lairson Costa wrote:
> The previous method of detecting support for -fcf-protection relied on
> a minimum GCC version check, which was not always accurate and could
> fail on different architectures or compiler toolchains.
> 
> This commit replaces the version check with a more robust method that
> directly tests if the compiler supports the -fcf-protection flag. This
> ensures better portability and avoids compilation errors on systems
> where the flag is not available.
> 
> This change mirrors the recently added detection logic for the
> -mno-omit-leaf-frame-pointer flag.
> 
> Signed-off-by: Wander Lairson Costa <wander@redhat.com>
> Cc: Derek Barbosa <debarbos@redhat.com>
> Cc: John Kacur <jkacur@redhat.com>
> Cc: Juri Lelli <juri.lelli@redhat.com>
> Cc: Chunsheng Luo <luochunsheng@ustc.edu>
> ---
>  Makefile | 23 ++++++++++++-----------
>  1 file changed, 12 insertions(+), 11 deletions(-)
> 
> diff --git a/Makefile b/Makefile
> index d605e60..23e786d 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -20,17 +20,14 @@ IS_MINVER := $(intcmp $(GCC_VER), $(MIN_GCC_VER), false, true, true)
>  $(info IS_MINVER=$(IS_MINVER))
>  
>  USE_BPF := 1
> -FCF_PROTECTION := -fcf-protection
>  MTUNE	:= -mtune=generic
>  M64	:= -m64
>  
>  ifeq ($(ARCH),aarch64)
> -FCF_PROTECTION := "-fcf-protection=none"
>  M64	:=
>  endif
>  ifeq ($(ARCH),i686)
>  USE_BPF := 0
> -FCF_PROTECTION := "-fcf-protection=branch"
>  endif
>  ifeq ($(ARCH),s390x)
>  MTUNE := -mtune=z13
> @@ -43,23 +40,23 @@ ifeq ($(ARCH),powerpc)
>  USE_BPF := 0
>  MTUNE := -mtune=powerpc
>  endif
> -ifeq ($(strip $(IS_MINVER)), false)
> -FCF_PROTECTION := 
> -endif
> -
> -
> -$(info USE_BPF=$(USE_BPF))
> -$(info FCF_PROTECTION=$(FCF_PROTECTION))
> -$(info MTUNE=$(MTUNE))
>  
>  DEBUG	?=	0
>  
>  INSTALL	=	install
>  CC	:=	gcc
> +
> +# Test if compiler supports -fcf-protection
> +FCF_PROTECTION := $(shell echo 'int main(void){return 0;}' | \
> +		$(CC) -x c -fcf-protection - \
> +		-o /dev/null 2>/dev/null && \
> +		echo '-fcf-protection')
> +
>  FOPTS	:=	-flto=auto -ffat-lto-objects -fexceptions -fstack-protector-strong \
>  		-fasynchronous-unwind-tables -fstack-clash-protection -fno-omit-frame-pointer \
>  		$(strip $(FCF_PROTECTION)) -fpie
>  
> +
>  # Test if compiler supports -mno-omit-leaf-frame-pointer
>  OMIT_LEAF_FP := $(shell echo 'int main(void){return 0;}' | \
>  		$(CC) -x c -mno-omit-leaf-frame-pointer - \
> @@ -74,6 +71,10 @@ DEFS	:=	-DUSE_BPF=$(USE_BPF) -D_FORTIFY_SOURCE=3 -D_GLIBCXX_ASSERTIONS -DDEBUG_S
>  
>  CFLAGS	:=      -DVERSION=\"$(VERSION)\" $(FOPTS) $(MOPTS) $(WOPTS) $(DEFS)
>  
> +$(info USE_BPF=$(USE_BPF))
> +$(info FCF_PROTECTION=$(FCF_PROTECTION))
> +$(info MTUNE=$(MTUNE))
> +
>  ifeq ($(DEBUG),0)
>  CFLAGS	+=	-g -O2
>  else
> -- 
> 2.51.1
> 
Signed-off-by: Clark Williams <williams@redhat.com>
-- 
The United States Coast Guard
Ruining Natural Selection since 1790

[stalld v2 3/6] Makefile: Explicitly run the 'test' target in the tests directory

[Wander Lairson Costa]

The 'tests' target in the main Makefile was invoking 'make' in the
'tests' subdirectory without specifying a target. This relied on the
default target in the tests/Makefile, which is not explicit.

This commit adds the 'test' target to the make command, making the
build process clearer and more robust.

Signed-off-by: Wander Lairson Costa <wander@redhat.com>
Cc: Derek Barbosa <debarbos@redhat.com>
Cc: John Kacur <jkacur@redhat.com>
Cc: Juri Lelli <juri.lelli@redhat.com>
Cc: Chunsheng Luo <luochunsheng@ustc.edu>
---
 Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 23e786d..619413f 100644
--- a/Makefile
+++ b/Makefile
@@ -183,7 +183,7 @@ static: $(OBJ)
 	$(CC) -o stalld-static $(LDFLAGS) --static $(OBJ) $(LIBS)
 
 tests:
-	make -C tests VERSION=$(VERSION) CFLAGS="$(CFLAGS)" LDFLAGS="$(LDFLAGS)"
+	make -C tests VERSION=$(VERSION) CFLAGS="$(CFLAGS)" LDFLAGS="$(LDFLAGS)" test
 
 .PHONY: install
 install: stalld
-- 
2.51.1

Re: [stalld v2 3/6] Makefile: Explicitly run the 'test' target in the tests directory

[Clark Williams]

On Mon, Nov 10, 2025 at 10:22:38AM -0300, Wander Lairson Costa wrote:
> The 'tests' target in the main Makefile was invoking 'make' in the
> 'tests' subdirectory without specifying a target. This relied on the
> default target in the tests/Makefile, which is not explicit.
> 
> This commit adds the 'test' target to the make command, making the
> build process clearer and more robust.
> 
> Signed-off-by: Wander Lairson Costa <wander@redhat.com>
> Cc: Derek Barbosa <debarbos@redhat.com>
> Cc: John Kacur <jkacur@redhat.com>
> Cc: Juri Lelli <juri.lelli@redhat.com>
> Cc: Chunsheng Luo <luochunsheng@ustc.edu>
> ---
>  Makefile | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/Makefile b/Makefile
> index 23e786d..619413f 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -183,7 +183,7 @@ static: $(OBJ)
>  	$(CC) -o stalld-static $(LDFLAGS) --static $(OBJ) $(LIBS)
>  
>  tests:
> -	make -C tests VERSION=$(VERSION) CFLAGS="$(CFLAGS)" LDFLAGS="$(LDFLAGS)"
> +	make -C tests VERSION=$(VERSION) CFLAGS="$(CFLAGS)" LDFLAGS="$(LDFLAGS)" test
>  

How do you feel about adding a 'sudo' to the make invocation, either
here or in the tests/Makefile?

If you don't then the tests run and all pass. If you run it as sudo you
find that there are still a couple of failures. 

Clark
-- 
The United States Coast Guard
Ruining Natural Selection since 1790

[stalld v2 4/6] Makefile: Remove redundant GCC version check

[Wander Lairson Costa]

The minimum GCC version check was introduced to handle the `-fcf-protection`
flag, which was not available in older compiler versions. However, a more
robust method that directly tests for compiler support for this flag has
been implemented.

This commit removes the now-redundant GCC version check, simplifying the
Makefile and relying on the more accurate feature detection.

Signed-off-by: Wander Lairson Costa <wander@redhat.com>
Cc: Derek Barbosa <debarbos@redhat.com>
Cc: John Kacur <jkacur@redhat.com>
Cc: Juri Lelli <juri.lelli@redhat.com>
Cc: Chunsheng Luo <luochunsheng@ustc.edu>
---
 Makefile | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/Makefile b/Makefile
index 619413f..ba67698 100644
--- a/Makefile
+++ b/Makefile
@@ -14,11 +14,6 @@ GCC_VER=$(shell gcc --version | grep ^gcc | cut -f 3 -d ' ' | cut -f 1 -d '.')
 endif
 $(info GCC_VER=$(GCC_VER))
 
-# Does the current GCC compiler have fcf-protection and c99+ as default?
-MIN_GCC_VER := 8
-IS_MINVER := $(intcmp $(GCC_VER), $(MIN_GCC_VER), false, true, true)
-$(info IS_MINVER=$(IS_MINVER))
-
 USE_BPF := 1
 MTUNE	:= -mtune=generic
 M64	:= -m64
-- 
2.51.1

Re: [stalld v2 4/6] Makefile: Remove redundant GCC version check

[Clark Williams]

On Mon, Nov 10, 2025 at 10:22:39AM -0300, Wander Lairson Costa wrote:
> The minimum GCC version check was introduced to handle the `-fcf-protection`
> flag, which was not available in older compiler versions. However, a more
> robust method that directly tests for compiler support for this flag has
> been implemented.
> 
> This commit removes the now-redundant GCC version check, simplifying the
> Makefile and relying on the more accurate feature detection.
> 
> Signed-off-by: Wander Lairson Costa <wander@redhat.com>
> Cc: Derek Barbosa <debarbos@redhat.com>
> Cc: John Kacur <jkacur@redhat.com>
> Cc: Juri Lelli <juri.lelli@redhat.com>
> Cc: Chunsheng Luo <luochunsheng@ustc.edu>
> ---
>  Makefile | 5 -----
>  1 file changed, 5 deletions(-)
> 
> diff --git a/Makefile b/Makefile
> index 619413f..ba67698 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -14,11 +14,6 @@ GCC_VER=$(shell gcc --version | grep ^gcc | cut -f 3 -d ' ' | cut -f 1 -d '.')
>  endif
>  $(info GCC_VER=$(GCC_VER))
>  
> -# Does the current GCC compiler have fcf-protection and c99+ as default?
> -MIN_GCC_VER := 8
> -IS_MINVER := $(intcmp $(GCC_VER), $(MIN_GCC_VER), false, true, true)
> -$(info IS_MINVER=$(IS_MINVER))
> -
>  USE_BPF := 1
>  MTUNE	:= -mtune=generic
>  M64	:= -m64
> -- 
> 2.51.1
> 
Signed-off-by: Clark Williams <williams@redhat.com>
-- 
The United States Coast Guard
Ruining Natural Selection since 1790

Re: [stalld v2 4/6] Makefile: Remove redundant GCC version check

[Derek Barbosa]

On Mon, Nov 10, 2025 at 10:22:39AM -0300, Wander Lairson Costa wrote:
> The minimum GCC version check was introduced to handle the `-fcf-protection`
> flag, which was not available in older compiler versions. However, a more
> robust method that directly tests for compiler support for this flag has
> been implemented.
> 
> This commit removes the now-redundant GCC version check, simplifying the
> Makefile and relying on the more accurate feature detection.
> 
> Signed-off-by: Wander Lairson Costa <wander@redhat.com>
> Cc: Derek Barbosa <debarbos@redhat.com>
> Cc: John Kacur <jkacur@redhat.com>
> Cc: Juri Lelli <juri.lelli@redhat.com>
> Cc: Chunsheng Luo <luochunsheng@ustc.edu>
> ---
>  Makefile | 5 -----
>  1 file changed, 5 deletions(-)
> 
> diff --git a/Makefile b/Makefile
> index 619413f..ba67698 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -14,11 +14,6 @@ GCC_VER=$(shell gcc --version | grep ^gcc | cut -f 3 -d ' ' | cut -f 1 -d '.')
>  endif
>  $(info GCC_VER=$(GCC_VER))
>  
> -# Does the current GCC compiler have fcf-protection and c99+ as default?
> -MIN_GCC_VER := 8
> -IS_MINVER := $(intcmp $(GCC_VER), $(MIN_GCC_VER), false, true, true)
> -$(info IS_MINVER=$(IS_MINVER))
> -
>  USE_BPF := 1
>  MTUNE	:= -mtune=generic
>  M64	:= -m64
> -- 
> 2.51.1
> 

Acked-by: Derek Barbosa <debarbos@redhat.com>

-- 
Derek <debarbos@redhat.com>

[stalld v2 5/6] Makefile: Print BPF tool versions for debugging

[Wander Lairson Costa]

This commit adds informational messages to the Makefile to print the
kernel version, clang version, and bpftool version. This will help in
debugging BPF-related compilation issues by providing clear information
about the build environment.

Signed-off-by: Wander Lairson Costa <wander@redhat.com>
Cc: Derek Barbosa <debarbos@redhat.com>
Cc: John Kacur <jkacur@redhat.com>
Cc: Juri Lelli <juri.lelli@redhat.com>
Cc: Chunsheng Luo <luochunsheng@ustc.edu>
---
 Makefile | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Makefile b/Makefile
index ba67698..43eb9b8 100644
--- a/Makefile
+++ b/Makefile
@@ -121,6 +121,10 @@ VMLINUX_BTF_PATHS	:= /sys/kernel/btf/vmlinux /boot/vmlinux-$(KERNEL_REL)
 VMLINUX_BTF_PATH	:= $(or $(VMLINUX_BTF),$(firstword                            \
                                           $(wildcard $(VMLINUX_BTF_PATHS))))
 
+$(info KERNEL=$(KERNEL_REL))
+$(info $(shell $(CLANG) --version | head -1))
+$(info $(shell $(BPFTOOL) --version))
+
 ifeq ($(ARCH),x86_64)
 CLANGARCH="-D__x86_64__"
 endif
-- 
2.51.1

Re: [stalld v2 5/6] Makefile: Print BPF tool versions for debugging

[Clark Williams]

On Mon, Nov 10, 2025 at 10:22:40AM -0300, Wander Lairson Costa wrote:
> This commit adds informational messages to the Makefile to print the
> kernel version, clang version, and bpftool version. This will help in
> debugging BPF-related compilation issues by providing clear information
> about the build environment.
> 
> Signed-off-by: Wander Lairson Costa <wander@redhat.com>
> Cc: Derek Barbosa <debarbos@redhat.com>
> Cc: John Kacur <jkacur@redhat.com>
> Cc: Juri Lelli <juri.lelli@redhat.com>
> Cc: Chunsheng Luo <luochunsheng@ustc.edu>
> ---
>  Makefile | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/Makefile b/Makefile
> index ba67698..43eb9b8 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -121,6 +121,10 @@ VMLINUX_BTF_PATHS	:= /sys/kernel/btf/vmlinux /boot/vmlinux-$(KERNEL_REL)
>  VMLINUX_BTF_PATH	:= $(or $(VMLINUX_BTF),$(firstword                            \
>                                            $(wildcard $(VMLINUX_BTF_PATHS))))
>  
> +$(info KERNEL=$(KERNEL_REL))
> +$(info $(shell $(CLANG) --version | head -1))
> +$(info $(shell $(BPFTOOL) --version))
> +
>  ifeq ($(ARCH),x86_64)
>  CLANGARCH="-D__x86_64__"
>  endif
> -- 
> 2.51.1
> 
Looks good to me

Signed-off-by: Clark Williams <williams@redhat.com>

-- 
The United States Coast Guard
Ruining Natural Selection since 1790

[stalld v2 6/6] gitignore: Exclude Serena and Claude Code metadata

[Wander Lairson Costa]

This commit adds .serena and CLAUDE.md to the .gitignore file to
prevent Serena IDE metadata and Claude Code documentation from being
tracked in version control. These files are development environment
specific and should not be part of the repository.

The .serena directory contains IDE-specific configuration and cache
files, while CLAUDE.md is used for AI-assisted development guidance.
Both are local-only files that vary between development environments
and should remain untracked.

Signed-off-by: Wander Lairson Costa <wander@redhat.com>
---
 .gitignore | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/.gitignore b/.gitignore
index dc802f6..62fddc0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -18,3 +18,5 @@ node_modules/
 patches/
 tests/legacy/test01
 *.patch
+.serena
+CLAUDE.md
-- 
2.51.1

Re: [stalld v2 6/6] gitignore: Exclude Serena and Claude Code metadata

[Clark Williams]

On Mon, Nov 10, 2025 at 10:22:41AM -0300, Wander Lairson Costa wrote:
> This commit adds .serena and CLAUDE.md to the .gitignore file to
> prevent Serena IDE metadata and Claude Code documentation from being
> tracked in version control. These files are development environment
> specific and should not be part of the repository.
> 
> The .serena directory contains IDE-specific configuration and cache
> files, while CLAUDE.md is used for AI-assisted development guidance.
> Both are local-only files that vary between development environments
> and should remain untracked.
> 
> Signed-off-by: Wander Lairson Costa <wander@redhat.com>
> ---
>  .gitignore | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/.gitignore b/.gitignore
> index dc802f6..62fddc0 100644
> --- a/.gitignore
> +++ b/.gitignore
> @@ -18,3 +18,5 @@ node_modules/
>  patches/
>  tests/legacy/test01
>  *.patch
> +.serena
> +CLAUDE.md
> -- 
> 2.51.1
> 

Signed-off-by: Clark Williams <williams@redhat.com>
-- 
The United States Coast Guard
Ruining Natural Selection since 1790

Re: [stalld v2 0/6] Improve Makefile portability and debugging

[Clark Williams]

On Mon, Nov 10, 2025 at 10:22:35AM -0300, Wander Lairson Costa wrote:
> This patch series improves the stalld build system to be more portable
> across different architectures and compiler toolchains while adding
> better debugging capabilities. The main motivation is to eliminate
> hard-coded compiler version checks that were brittle and could fail on
> non-standard toolchains or different architectures.
> 
> The changes replace minimum version checks with direct compiler feature
> detection tests, ensuring that compiler flags are only used when
> actually supported. This approach tests each flag by attempting to
> compile a minimal test program, making the build system resilient to
> variations in compiler implementations across architectures like x86_64,
> aarch64, s390x, i686, and powerpc. Additionally, the series adds build
> environment information output and cleans up redundant checks to improve
> maintainability.
> 
> The series also includes minor improvements to explicitly specify the
> test target invocation and exclude development environment metadata from
> version control.
> 
> Wander Lairson Costa (6):
>   Makefile: Conditionally add -mno-omit-leaf-frame-pointer
>   Makefile: Improve compiler flag detection for -fcf-protection
>   Makefile: Explicitly run the 'test' target in the tests directory
>   Makefile: Remove redundant GCC version check
>   Makefile: Print BPF tool versions for debugging
>   gitignore: Exclude Serena and Claude Code metadata
> 
>  .gitignore |  2 ++
>  Makefile   | 42 ++++++++++++++++++++++++------------------
>  2 files changed, 26 insertions(+), 18 deletions(-)
> 
> Signed-off-by: Wander Lairson Costa <wander@redhat.com>
> Cc: Derek Barbosa <debarbos@redhat.com>
> Cc: John Kacur <jkacur@redhat.com>
> Cc: Juri Lelli <juri.lelli@redhat.com>
> Cc: Chunsheng Luo <luochunsheng@ustc.edu>

Ack for the series (note that I have this now in my devel branch, which
is based on v1.25.1)

Signed-off-by: Clark Williams <williams@redhat.com>
-- 
The United States Coast Guard
Ruining Natural Selection since 1790