From f10087671538e8e052f035f011fc826f36f2af3b Mon Sep 17 00:00:00 2001 From: Jeremi Piotrowski Date: Thu, 29 Feb 2024 10:00:22 +0100 Subject: [PATCH] Fix parallel build of gnu-efi When building with make 4.4.1, gnu-efi may be built twice and in parallel: $ make -n -j ARCH=x86_64 2>&1 | tee build.log $ grep -e 'make -C gnu-efi' build.log make -C gnu-efi \ make -C gnu-efi \ This has been seen to cause linking failures when building libgnuefi.a because some object files may end up truncated. The reason for this is that make interprets multiple targets in the same rule as independent and can run the rule multiple times. The solution is to define a grouped target with &:, which causes make to behave the way one expects: runs the rule once and expects it to create all targets. Grouped target support was added in make 4.3 released 4 years ago. Signed-off-by: Jeremi Piotrowski --- Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/Makefile b/Makefile index 8283d56f3..bbf707b71 100644 --- a/Makefile +++ b/Makefile @@ -154,7 +154,7 @@ $(MMSONAME): $(MOK_OBJS) $(LIBS) $(LD) -o $@ $(LDFLAGS) $^ $(EFI_LIBS) lib/lib.a gnu-efi/$(ARCH_GNUEFI)/gnuefi/libgnuefi.a gnu-efi/$(ARCH_GNUEFI)/lib/libefi.a: CFLAGS+=-DGNU_EFI_USE_EXTERNAL_STDARG -gnu-efi/$(ARCH_GNUEFI)/gnuefi/libgnuefi.a gnu-efi/$(ARCH_GNUEFI)/lib/libefi.a: +gnu-efi/$(ARCH_GNUEFI)/gnuefi/libgnuefi.a gnu-efi/$(ARCH_GNUEFI)/lib/libefi.a &: mkdir -p gnu-efi/lib gnu-efi/gnuefi $(MAKE) -C gnu-efi \ COMPILER="$(COMPILER)" \