| Message ID | 20190509073555.15545-1-yamada.masahiro@socionext.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | kbuild: terminate Kconfig when $(CC) or $(LD) is missing | expand |
On Thu, May 9, 2019 at 4:36 PM Masahiro Yamada <yamada.masahiro@socionext.com> wrote: > > If the compiler specified by $(CC) is not present, the Kconfig stage > sprinkles 'not found' messages, then succeeds. > > $ make CROSS_COMPILE=foo defconfig > /bin/sh: 1: foogcc: not found > /bin/sh: 1: foogcc: not found > *** Default configuration is based on 'x86_64_defconfig' > ./scripts/gcc-version.sh: 17: ./scripts/gcc-version.sh: foogcc: not found > ./scripts/gcc-version.sh: 18: ./scripts/gcc-version.sh: foogcc: not found > ./scripts/gcc-version.sh: 19: ./scripts/gcc-version.sh: foogcc: not found > ./scripts/gcc-version.sh: 17: ./scripts/gcc-version.sh: foogcc: not found > ./scripts/gcc-version.sh: 18: ./scripts/gcc-version.sh: foogcc: not found > ./scripts/gcc-version.sh: 19: ./scripts/gcc-version.sh: foogcc: not found > ./scripts/clang-version.sh: 11: ./scripts/clang-version.sh: foogcc: not found > ./scripts/gcc-plugin.sh: 11: ./scripts/gcc-plugin.sh: foogcc: not found > init/Kconfig:16:warning: 'GCC_VERSION': number is invalid > # > # configuration written to .config > # > > Terminate parsing files immediately if $(CC) or $(LD) is not found. > "make *config" will fail more nicely. > > $ make CROSS_COMPILE=foo defconfig > *** Default configuration is based on 'x86_64_defconfig' > scripts/Kconfig.include:34: compiler 'foogcc' not found > make[1]: *** [scripts/kconfig/Makefile;82: defconfig] Error 1 > make: *** [Makefile;557: defconfig] Error 2 > > Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> > --- Applied to linux-kbuild. > Makefile | 2 +- > scripts/Kconfig.include | 8 ++++++++ > 2 files changed, 9 insertions(+), 1 deletion(-) > > diff --git a/Makefile b/Makefile > index 28965187c528..bd7ae11947cb 100644 > --- a/Makefile > +++ b/Makefile > @@ -537,7 +537,7 @@ endif > # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. > # CC_VERSION_TEXT is referenced from Kconfig (so it needs export), > # and from include/config/auto.conf.cmd to detect the compiler upgrade. > -CC_VERSION_TEXT = $(shell $(CC) --version | head -n 1) > +CC_VERSION_TEXT = $(shell $(CC) --version 2>/dev/null | head -n 1) > > ifeq ($(config-targets),1) > # =========================================================================== > diff --git a/scripts/Kconfig.include b/scripts/Kconfig.include > index 87ff1dcc6bd5..0b267fb27f07 100644 > --- a/scripts/Kconfig.include > +++ b/scripts/Kconfig.include > @@ -18,6 +18,10 @@ if-success = $(shell,{ $(1); } >/dev/null 2>&1 && echo "$(2)" || echo "$(3)") > # Return y if <command> exits with 0, n otherwise > success = $(if-success,$(1),y,n) > > +# $(failure,<command>) > +# Return n if <command> exits with 0, y otherwise > +failure = $(if-success,$(1),n,y) > + > # $(cc-option,<flag>) > # Return y if the compiler supports <flag>, n otherwise > cc-option = $(success,$(CC) -Werror $(1) -E -x c /dev/null -o /dev/null) > @@ -26,5 +30,9 @@ cc-option = $(success,$(CC) -Werror $(1) -E -x c /dev/null -o /dev/null) > # Return y if the linker supports <flag>, n otherwise > ld-option = $(success,$(LD) -v $(1)) > > +# check if $(CC) and $(LD) exist > +$(error-if,$(failure,command -v $(CC)),compiler '$(CC)' not found) > +$(error-if,$(failure,command -v $(LD)),linker '$(LD)' not found) > + > # gcc version including patch level > gcc-version := $(shell,$(srctree)/scripts/gcc-version.sh $(CC)) > -- > 2.17.1 >
On Mon, 13 May 2019 at 02:28, Masahiro Yamada <yamada.masahiro@socionext.com> wrote: > > On Thu, May 9, 2019 at 4:36 PM Masahiro Yamada > <yamada.masahiro@socionext.com> wrote: > > > > If the compiler specified by $(CC) is not present, the Kconfig stage > > sprinkles 'not found' messages, then succeeds. > > > > $ make CROSS_COMPILE=foo defconfig > > /bin/sh: 1: foogcc: not found > > /bin/sh: 1: foogcc: not found > > *** Default configuration is based on 'x86_64_defconfig' > > ./scripts/gcc-version.sh: 17: ./scripts/gcc-version.sh: foogcc: not found > > ./scripts/gcc-version.sh: 18: ./scripts/gcc-version.sh: foogcc: not found > > ./scripts/gcc-version.sh: 19: ./scripts/gcc-version.sh: foogcc: not found > > ./scripts/gcc-version.sh: 17: ./scripts/gcc-version.sh: foogcc: not found > > ./scripts/gcc-version.sh: 18: ./scripts/gcc-version.sh: foogcc: not found > > ./scripts/gcc-version.sh: 19: ./scripts/gcc-version.sh: foogcc: not found > > ./scripts/clang-version.sh: 11: ./scripts/clang-version.sh: foogcc: not found > > ./scripts/gcc-plugin.sh: 11: ./scripts/gcc-plugin.sh: foogcc: not found > > init/Kconfig:16:warning: 'GCC_VERSION': number is invalid > > # > > # configuration written to .config > > # > > > > Terminate parsing files immediately if $(CC) or $(LD) is not found. > > "make *config" will fail more nicely. > > > > $ make CROSS_COMPILE=foo defconfig > > *** Default configuration is based on 'x86_64_defconfig' > > scripts/Kconfig.include:34: compiler 'foogcc' not found > > make[1]: *** [scripts/kconfig/Makefile;82: defconfig] Error 1 > > make: *** [Makefile;557: defconfig] Error 2 > > > > Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> > > --- > > Applied to linux-kbuild. Thanks Masahiro! I had this in my inbox to test but you're too efficient. Testing your patch on linus' tree as of today (d7a02fa0a8f9) gives me this output: $ CROSS_COMPILE=foo make make: foogcc: Command not found scripts/kconfig/conf --syncconfig Kconfig scripts/Kconfig.include:34: compiler 'foogcc' not found make[2]: *** [scripts/kconfig/Makefile:69: syncconfig] Error 1 make[1]: *** [Makefile:557: syncconfig] Error 2 make: *** [include/config/auto.conf.cmd] Deleting file 'include/config/tristate.conf' make: Failed to remake makefile 'include/config/auto.conf'. SYSTBL arch/x86/include/generated/asm/syscalls_32.h SYSHDR arch/x86/include/generated/asm/unistd_32_ia32.h SYSHDR arch/x86/include/generated/asm/unistd_64_x32.h SYSTBL arch/x86/include/generated/asm/syscalls_64.h SYSHDR arch/x86/include/generated/uapi/asm/unistd_32.h SYSHDR arch/x86/include/generated/uapi/asm/unistd_64.h SYSHDR arch/x86/include/generated/uapi/asm/unistd_x32.h HOSTCC arch/x86/tools/relocs_32.o HOSTCC arch/x86/tools/relocs_64.o HOSTCC arch/x86/tools/relocs_common.o HOSTLD arch/x86/tools/relocs UPD include/config/kernel.release WRAP arch/x86/include/generated/uapi/asm/bpf_perf_event.h WRAP arch/x86/include/generated/uapi/asm/poll.h WRAP arch/x86/include/generated/uapi/asm/socket.h WRAP arch/x86/include/generated/uapi/asm/sockios.h WRAP arch/x86/include/generated/asm/dma-contiguous.h WRAP arch/x86/include/generated/asm/early_ioremap.h WRAP arch/x86/include/generated/asm/export.h WRAP arch/x86/include/generated/asm/mcs_spinlock.h WRAP arch/x86/include/generated/asm/mm-arch-hooks.h WRAP arch/x86/include/generated/asm/mmiowb.h UPD include/generated/uapi/linux/version.h UPD include/generated/utsrelease.h HOSTCC scripts/selinux/genheaders/genheaders HOSTCC scripts/selinux/mdp/mdp HOSTCC scripts/kallsyms HOSTCC scripts/pnmtologo HOSTCC scripts/conmakehash HOSTCC scripts/sortextable HOSTCC scripts/asn1_compiler HOSTCC scripts/extract-cert You are building kernel with non-retpoline compiler. Please update your compiler. make: *** [arch/x86/Makefile:308: checkbin] Error 1 Which is a little confusing. The second time is shorter, but the retpoline message is not ideal: $ CROSS_COMPILE=foo make make: foogcc: Command not found scripts/kconfig/conf --syncconfig Kconfig scripts/Kconfig.include:34: compiler 'foogcc' not found make[2]: *** [scripts/kconfig/Makefile:69: syncconfig] Error 1 make[1]: *** [Makefile:557: syncconfig] Error 2 make: Failed to remake makefile 'include/config/auto.conf'. You are building kernel with non-retpoline compiler. Please update your compiler. Cheers, Joel > > > > Makefile | 2 +- > > scripts/Kconfig.include | 8 ++++++++ > > 2 files changed, 9 insertions(+), 1 deletion(-) > > > > diff --git a/Makefile b/Makefile > > index 28965187c528..bd7ae11947cb 100644 > > --- a/Makefile > > +++ b/Makefile > > @@ -537,7 +537,7 @@ endif > > # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. > > # CC_VERSION_TEXT is referenced from Kconfig (so it needs export), > > # and from include/config/auto.conf.cmd to detect the compiler upgrade. > > -CC_VERSION_TEXT = $(shell $(CC) --version | head -n 1) > > +CC_VERSION_TEXT = $(shell $(CC) --version 2>/dev/null | head -n 1) > > > > ifeq ($(config-targets),1) > > # =========================================================================== > > diff --git a/scripts/Kconfig.include b/scripts/Kconfig.include > > index 87ff1dcc6bd5..0b267fb27f07 100644 > > --- a/scripts/Kconfig.include > > +++ b/scripts/Kconfig.include > > @@ -18,6 +18,10 @@ if-success = $(shell,{ $(1); } >/dev/null 2>&1 && echo "$(2)" || echo "$(3)") > > # Return y if <command> exits with 0, n otherwise > > success = $(if-success,$(1),y,n) > > > > +# $(failure,<command>) > > +# Return n if <command> exits with 0, y otherwise > > +failure = $(if-success,$(1),n,y) > > + > > # $(cc-option,<flag>) > > # Return y if the compiler supports <flag>, n otherwise > > cc-option = $(success,$(CC) -Werror $(1) -E -x c /dev/null -o /dev/null) > > @@ -26,5 +30,9 @@ cc-option = $(success,$(CC) -Werror $(1) -E -x c /dev/null -o /dev/null) > > # Return y if the linker supports <flag>, n otherwise > > ld-option = $(success,$(LD) -v $(1)) > > > > +# check if $(CC) and $(LD) exist > > +$(error-if,$(failure,command -v $(CC)),compiler '$(CC)' not found) > > +$(error-if,$(failure,command -v $(LD)),linker '$(LD)' not found) > > + > > # gcc version including patch level > > gcc-version := $(shell,$(srctree)/scripts/gcc-version.sh $(CC)) > > -- > > 2.17.1 > > > > > -- > Best Regards > Masahiro Yamada
On Mon, May 13, 2019 at 11:35 AM Joel Stanley <joel@jms.id.au> wrote: > > On Mon, 13 May 2019 at 02:28, Masahiro Yamada > <yamada.masahiro@socionext.com> wrote: > > > > On Thu, May 9, 2019 at 4:36 PM Masahiro Yamada > > <yamada.masahiro@socionext.com> wrote: > > > > > > If the compiler specified by $(CC) is not present, the Kconfig stage > > > sprinkles 'not found' messages, then succeeds. > > > > > > $ make CROSS_COMPILE=foo defconfig > > > /bin/sh: 1: foogcc: not found > > > /bin/sh: 1: foogcc: not found > > > *** Default configuration is based on 'x86_64_defconfig' > > > ./scripts/gcc-version.sh: 17: ./scripts/gcc-version.sh: foogcc: not found > > > ./scripts/gcc-version.sh: 18: ./scripts/gcc-version.sh: foogcc: not found > > > ./scripts/gcc-version.sh: 19: ./scripts/gcc-version.sh: foogcc: not found > > > ./scripts/gcc-version.sh: 17: ./scripts/gcc-version.sh: foogcc: not found > > > ./scripts/gcc-version.sh: 18: ./scripts/gcc-version.sh: foogcc: not found > > > ./scripts/gcc-version.sh: 19: ./scripts/gcc-version.sh: foogcc: not found > > > ./scripts/clang-version.sh: 11: ./scripts/clang-version.sh: foogcc: not found > > > ./scripts/gcc-plugin.sh: 11: ./scripts/gcc-plugin.sh: foogcc: not found > > > init/Kconfig:16:warning: 'GCC_VERSION': number is invalid > > > # > > > # configuration written to .config > > > # > > > > > > Terminate parsing files immediately if $(CC) or $(LD) is not found. > > > "make *config" will fail more nicely. > > > > > > $ make CROSS_COMPILE=foo defconfig > > > *** Default configuration is based on 'x86_64_defconfig' > > > scripts/Kconfig.include:34: compiler 'foogcc' not found > > > make[1]: *** [scripts/kconfig/Makefile;82: defconfig] Error 1 > > > make: *** [Makefile;557: defconfig] Error 2 > > > > > > Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> > > > --- > > > > Applied to linux-kbuild. > > Thanks Masahiro! I had this in my inbox to test but you're too efficient. > > Testing your patch on linus' tree as of today (d7a02fa0a8f9) gives me > this output: > > $ CROSS_COMPILE=foo make > make: foogcc: Command not found > scripts/kconfig/conf --syncconfig Kconfig > scripts/Kconfig.include:34: compiler 'foogcc' not found > make[2]: *** [scripts/kconfig/Makefile:69: syncconfig] Error 1 > make[1]: *** [Makefile:557: syncconfig] Error 2 > make: *** [include/config/auto.conf.cmd] Deleting file > 'include/config/tristate.conf' > make: Failed to remake makefile 'include/config/auto.conf'. > SYSTBL arch/x86/include/generated/asm/syscalls_32.h > SYSHDR arch/x86/include/generated/asm/unistd_32_ia32.h > SYSHDR arch/x86/include/generated/asm/unistd_64_x32.h > SYSTBL arch/x86/include/generated/asm/syscalls_64.h > SYSHDR arch/x86/include/generated/uapi/asm/unistd_32.h > SYSHDR arch/x86/include/generated/uapi/asm/unistd_64.h > SYSHDR arch/x86/include/generated/uapi/asm/unistd_x32.h > HOSTCC arch/x86/tools/relocs_32.o > HOSTCC arch/x86/tools/relocs_64.o > HOSTCC arch/x86/tools/relocs_common.o > HOSTLD arch/x86/tools/relocs > UPD include/config/kernel.release > WRAP arch/x86/include/generated/uapi/asm/bpf_perf_event.h > WRAP arch/x86/include/generated/uapi/asm/poll.h > WRAP arch/x86/include/generated/uapi/asm/socket.h > WRAP arch/x86/include/generated/uapi/asm/sockios.h > WRAP arch/x86/include/generated/asm/dma-contiguous.h > WRAP arch/x86/include/generated/asm/early_ioremap.h > WRAP arch/x86/include/generated/asm/export.h > WRAP arch/x86/include/generated/asm/mcs_spinlock.h > WRAP arch/x86/include/generated/asm/mm-arch-hooks.h > WRAP arch/x86/include/generated/asm/mmiowb.h > UPD include/generated/uapi/linux/version.h > UPD include/generated/utsrelease.h > HOSTCC scripts/selinux/genheaders/genheaders > HOSTCC scripts/selinux/mdp/mdp > HOSTCC scripts/kallsyms > HOSTCC scripts/pnmtologo > HOSTCC scripts/conmakehash > HOSTCC scripts/sortextable > HOSTCC scripts/asn1_compiler > HOSTCC scripts/extract-cert > You are building kernel with non-retpoline compiler. > Please update your compiler. > make: *** [arch/x86/Makefile:308: checkbin] Error 1 > > Which is a little confusing. > > The second time is shorter, but the retpoline message is not ideal: > > $ CROSS_COMPILE=foo make > make: foogcc: Command not found > scripts/kconfig/conf --syncconfig Kconfig > scripts/Kconfig.include:34: compiler 'foogcc' not found > make[2]: *** [scripts/kconfig/Makefile:69: syncconfig] Error 1 > make[1]: *** [Makefile:557: syncconfig] Error 2 > make: Failed to remake makefile 'include/config/auto.conf'. > You are building kernel with non-retpoline compiler. > Please update your compiler. I think you are seeing a different bug. Please test after applying this as well: https://patchwork.kernel.org/patch/10939845/ Thanks.
On Mon, 13 May 2019 at 02:50, Masahiro Yamada <yamada.masahiro@socionext.com> wrote: > > $ CROSS_COMPILE=foo make > > make: foogcc: Command not found > > scripts/kconfig/conf --syncconfig Kconfig > > scripts/Kconfig.include:34: compiler 'foogcc' not found > > make[2]: *** [scripts/kconfig/Makefile:69: syncconfig] Error 1 > > make[1]: *** [Makefile:557: syncconfig] Error 2 > > make: Failed to remake makefile 'include/config/auto.conf'. > > You are building kernel with non-retpoline compiler. > > Please update your compiler. > > > I think you are seeing a different bug. > > Please test after applying this as well: > https://patchwork.kernel.org/patch/10939845/ That did the trick. Thank you. Cheers, Joel
On Thu, May 09, 2019 at 04:35:55PM +0900, Masahiro Yamada wrote: > If the compiler specified by $(CC) is not present, the Kconfig stage > sprinkles 'not found' messages, then succeeds. > > $ make CROSS_COMPILE=foo defconfig > /bin/sh: 1: foogcc: not found > /bin/sh: 1: foogcc: not found > *** Default configuration is based on 'x86_64_defconfig' > ./scripts/gcc-version.sh: 17: ./scripts/gcc-version.sh: foogcc: not found > ./scripts/gcc-version.sh: 18: ./scripts/gcc-version.sh: foogcc: not found > ./scripts/gcc-version.sh: 19: ./scripts/gcc-version.sh: foogcc: not found > ./scripts/gcc-version.sh: 17: ./scripts/gcc-version.sh: foogcc: not found > ./scripts/gcc-version.sh: 18: ./scripts/gcc-version.sh: foogcc: not found > ./scripts/gcc-version.sh: 19: ./scripts/gcc-version.sh: foogcc: not found > ./scripts/clang-version.sh: 11: ./scripts/clang-version.sh: foogcc: not found > ./scripts/gcc-plugin.sh: 11: ./scripts/gcc-plugin.sh: foogcc: not found > init/Kconfig:16:warning: 'GCC_VERSION': number is invalid > # > # configuration written to .config > # > > Terminate parsing files immediately if $(CC) or $(LD) is not found. > "make *config" will fail more nicely. > > $ make CROSS_COMPILE=foo defconfig > *** Default configuration is based on 'x86_64_defconfig' > scripts/Kconfig.include:34: compiler 'foogcc' not found > make[1]: *** [scripts/kconfig/Makefile;82: defconfig] Error 1 > make: *** [Makefile;557: defconfig] Error 2 > > Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> > --- > > Makefile | 2 +- > scripts/Kconfig.include | 8 ++++++++ > 2 files changed, 9 insertions(+), 1 deletion(-) > > diff --git a/Makefile b/Makefile > index 28965187c528..bd7ae11947cb 100644 > --- a/Makefile > +++ b/Makefile > @@ -537,7 +537,7 @@ endif > # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. > # CC_VERSION_TEXT is referenced from Kconfig (so it needs export), > # and from include/config/auto.conf.cmd to detect the compiler upgrade. > -CC_VERSION_TEXT = $(shell $(CC) --version | head -n 1) > +CC_VERSION_TEXT = $(shell $(CC) --version 2>/dev/null | head -n 1) > > ifeq ($(config-targets),1) > # =========================================================================== > diff --git a/scripts/Kconfig.include b/scripts/Kconfig.include > index 87ff1dcc6bd5..0b267fb27f07 100644 > --- a/scripts/Kconfig.include > +++ b/scripts/Kconfig.include > @@ -18,6 +18,10 @@ if-success = $(shell,{ $(1); } >/dev/null 2>&1 && echo "$(2)" || echo "$(3)") > # Return y if <command> exits with 0, n otherwise > success = $(if-success,$(1),y,n) > > +# $(failure,<command>) > +# Return n if <command> exits with 0, y otherwise > +failure = $(if-success,$(1),n,y) > + > # $(cc-option,<flag>) > # Return y if the compiler supports <flag>, n otherwise > cc-option = $(success,$(CC) -Werror $(1) -E -x c /dev/null -o /dev/null) > @@ -26,5 +30,9 @@ cc-option = $(success,$(CC) -Werror $(1) -E -x c /dev/null -o /dev/null) > # Return y if the linker supports <flag>, n otherwise > ld-option = $(success,$(LD) -v $(1)) > > +# check if $(CC) and $(LD) exist > +$(error-if,$(failure,command -v $(CC)),compiler '$(CC)' not found) > +$(error-if,$(failure,command -v $(LD)),linker '$(LD)' not found) As mentioned in the other thread, $(AS) should be checked as well since it's possible that neither $(CC) nor $(LD) will involve $(CROSS_COMPILE), like the combination of clang + ld.lld, whereas $(AS) will (currently) always involve $(CROSS_COMPILE). > + > # gcc version including patch level > gcc-version := $(shell,$(srctree)/scripts/gcc-version.sh $(CC)) > -- > 2.17.1 >
On Mon, May 13, 2019 at 1:47 PM Nathan Chancellor <natechancellor@gmail.com> wrote: > > On Thu, May 09, 2019 at 04:35:55PM +0900, Masahiro Yamada wrote: > > If the compiler specified by $(CC) is not present, the Kconfig stage > > sprinkles 'not found' messages, then succeeds. > > > > $ make CROSS_COMPILE=foo defconfig > > /bin/sh: 1: foogcc: not found > > /bin/sh: 1: foogcc: not found > > *** Default configuration is based on 'x86_64_defconfig' > > ./scripts/gcc-version.sh: 17: ./scripts/gcc-version.sh: foogcc: not found > > ./scripts/gcc-version.sh: 18: ./scripts/gcc-version.sh: foogcc: not found > > ./scripts/gcc-version.sh: 19: ./scripts/gcc-version.sh: foogcc: not found > > ./scripts/gcc-version.sh: 17: ./scripts/gcc-version.sh: foogcc: not found > > ./scripts/gcc-version.sh: 18: ./scripts/gcc-version.sh: foogcc: not found > > ./scripts/gcc-version.sh: 19: ./scripts/gcc-version.sh: foogcc: not found > > ./scripts/clang-version.sh: 11: ./scripts/clang-version.sh: foogcc: not found > > ./scripts/gcc-plugin.sh: 11: ./scripts/gcc-plugin.sh: foogcc: not found > > init/Kconfig:16:warning: 'GCC_VERSION': number is invalid > > # > > # configuration written to .config > > # > > > > Terminate parsing files immediately if $(CC) or $(LD) is not found. > > "make *config" will fail more nicely. > > > > $ make CROSS_COMPILE=foo defconfig > > *** Default configuration is based on 'x86_64_defconfig' > > scripts/Kconfig.include:34: compiler 'foogcc' not found > > make[1]: *** [scripts/kconfig/Makefile;82: defconfig] Error 1 > > make: *** [Makefile;557: defconfig] Error 2 > > > > Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> > > --- > > > > Makefile | 2 +- > > scripts/Kconfig.include | 8 ++++++++ > > 2 files changed, 9 insertions(+), 1 deletion(-) > > > > diff --git a/Makefile b/Makefile > > index 28965187c528..bd7ae11947cb 100644 > > --- a/Makefile > > +++ b/Makefile > > @@ -537,7 +537,7 @@ endif > > # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. > > # CC_VERSION_TEXT is referenced from Kconfig (so it needs export), > > # and from include/config/auto.conf.cmd to detect the compiler upgrade. > > -CC_VERSION_TEXT = $(shell $(CC) --version | head -n 1) > > +CC_VERSION_TEXT = $(shell $(CC) --version 2>/dev/null | head -n 1) > > > > ifeq ($(config-targets),1) > > # =========================================================================== > > diff --git a/scripts/Kconfig.include b/scripts/Kconfig.include > > index 87ff1dcc6bd5..0b267fb27f07 100644 > > --- a/scripts/Kconfig.include > > +++ b/scripts/Kconfig.include > > @@ -18,6 +18,10 @@ if-success = $(shell,{ $(1); } >/dev/null 2>&1 && echo "$(2)" || echo "$(3)") > > # Return y if <command> exits with 0, n otherwise > > success = $(if-success,$(1),y,n) > > > > +# $(failure,<command>) > > +# Return n if <command> exits with 0, y otherwise > > +failure = $(if-success,$(1),n,y) > > + > > # $(cc-option,<flag>) > > # Return y if the compiler supports <flag>, n otherwise > > cc-option = $(success,$(CC) -Werror $(1) -E -x c /dev/null -o /dev/null) > > @@ -26,5 +30,9 @@ cc-option = $(success,$(CC) -Werror $(1) -E -x c /dev/null -o /dev/null) > > # Return y if the linker supports <flag>, n otherwise > > ld-option = $(success,$(LD) -v $(1)) > > > > +# check if $(CC) and $(LD) exist > > +$(error-if,$(failure,command -v $(CC)),compiler '$(CC)' not found) > > +$(error-if,$(failure,command -v $(LD)),linker '$(LD)' not found) > > As mentioned in the other thread, $(AS) should be checked as well since > it's possible that neither $(CC) nor $(LD) will involve $(CROSS_COMPILE), > like the combination of clang + ld.lld, whereas $(AS) will (currently) > always involve $(CROSS_COMPILE). Indeed. This patch cannot check the presence of the intended gnu toolchains if CC=clang LD=ld.lld The reason for $(CC) / $(LD) checks in Kconfig is because it evaluates some $(cc-option, ...) and $(ld-option, ...) calls. Currently, Kconfig does not have as-option, but I will add it sooner or later, so I am fine with adding $(error-if,$(failure,command -v $(AS)),assembler '$(AS)' not found) > > + > > # gcc version including patch level > > gcc-version := $(shell,$(srctree)/scripts/gcc-version.sh $(CC)) > > -- > > 2.17.1 > > -- Best Regards Masahiro Yamada
diff --git a/Makefile b/Makefile index 28965187c528..bd7ae11947cb 100644 --- a/Makefile +++ b/Makefile @@ -537,7 +537,7 @@ endif # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. # CC_VERSION_TEXT is referenced from Kconfig (so it needs export), # and from include/config/auto.conf.cmd to detect the compiler upgrade. -CC_VERSION_TEXT = $(shell $(CC) --version | head -n 1) +CC_VERSION_TEXT = $(shell $(CC) --version 2>/dev/null | head -n 1) ifeq ($(config-targets),1) # =========================================================================== diff --git a/scripts/Kconfig.include b/scripts/Kconfig.include index 87ff1dcc6bd5..0b267fb27f07 100644 --- a/scripts/Kconfig.include +++ b/scripts/Kconfig.include @@ -18,6 +18,10 @@ if-success = $(shell,{ $(1); } >/dev/null 2>&1 && echo "$(2)" || echo "$(3)") # Return y if <command> exits with 0, n otherwise success = $(if-success,$(1),y,n) +# $(failure,<command>) +# Return n if <command> exits with 0, y otherwise +failure = $(if-success,$(1),n,y) + # $(cc-option,<flag>) # Return y if the compiler supports <flag>, n otherwise cc-option = $(success,$(CC) -Werror $(1) -E -x c /dev/null -o /dev/null) @@ -26,5 +30,9 @@ cc-option = $(success,$(CC) -Werror $(1) -E -x c /dev/null -o /dev/null) # Return y if the linker supports <flag>, n otherwise ld-option = $(success,$(LD) -v $(1)) +# check if $(CC) and $(LD) exist +$(error-if,$(failure,command -v $(CC)),compiler '$(CC)' not found) +$(error-if,$(failure,command -v $(LD)),linker '$(LD)' not found) + # gcc version including patch level gcc-version := $(shell,$(srctree)/scripts/gcc-version.sh $(CC))
If the compiler specified by $(CC) is not present, the Kconfig stage sprinkles 'not found' messages, then succeeds. $ make CROSS_COMPILE=foo defconfig /bin/sh: 1: foogcc: not found /bin/sh: 1: foogcc: not found *** Default configuration is based on 'x86_64_defconfig' ./scripts/gcc-version.sh: 17: ./scripts/gcc-version.sh: foogcc: not found ./scripts/gcc-version.sh: 18: ./scripts/gcc-version.sh: foogcc: not found ./scripts/gcc-version.sh: 19: ./scripts/gcc-version.sh: foogcc: not found ./scripts/gcc-version.sh: 17: ./scripts/gcc-version.sh: foogcc: not found ./scripts/gcc-version.sh: 18: ./scripts/gcc-version.sh: foogcc: not found ./scripts/gcc-version.sh: 19: ./scripts/gcc-version.sh: foogcc: not found ./scripts/clang-version.sh: 11: ./scripts/clang-version.sh: foogcc: not found ./scripts/gcc-plugin.sh: 11: ./scripts/gcc-plugin.sh: foogcc: not found init/Kconfig:16:warning: 'GCC_VERSION': number is invalid # # configuration written to .config # Terminate parsing files immediately if $(CC) or $(LD) is not found. "make *config" will fail more nicely. $ make CROSS_COMPILE=foo defconfig *** Default configuration is based on 'x86_64_defconfig' scripts/Kconfig.include:34: compiler 'foogcc' not found make[1]: *** [scripts/kconfig/Makefile;82: defconfig] Error 1 make: *** [Makefile;557: defconfig] Error 2 Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> --- Makefile | 2 +- scripts/Kconfig.include | 8 ++++++++ 2 files changed, 9 insertions(+), 1 deletion(-)