x86: Enable 32-bit build using x86_64 multilib toolchain

Until now building the x86 arch boards required 32-bit toolchain. As many x86_64 toolchains come with 32-bit support (multilib) that's a good idea to enable build with such toolchains. The change required was to specify the usage of 32-bit explicitly to the compiler and the linker (-m32 and -m elf_i386 flags) and locate the right libgcc path. Signed-off-by: Vasili Galka <vvv444@gmail.com> Acked-by: Simon Glass <sjg@chromium.org>

x86: Enable 32-bit build using x86_64 multilib toolchain
Until now building the x86 arch boards required 32-bit toolchain. As many x86_64 toolchains come with 32-bit support (multilib) that's a good idea to enable build with such toolchains. The change required was to specify the usage of 32-bit explicitly to the compiler and the linker (-m32 and -m elf_i386 flags) and locate the right libgcc path. Signed-off-by: Vasili Galka <vvv444@gmail.com> Acked-by: Simon Glass <sjg@chromium.org>
Vasili Galka · Simon Glass
1 parent 038380597b
Showing 2 changed files with 4 additions and 3 deletions Side-by-side Diff
arch/x86/config.mk
arch/x86/cpu/config.mk
@@ -16,18 +16,19 @@
 PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_X86)
 PLATFORM_CPPFLAGS += -fno-dwarf2-cfi-asm
 PLATFORM_CPPFLAGS += -DREALMODE_BASE=0x7c0
+PLATFORM_CPPFLAGS += -march=i386 -m32
  
 # Support generic board on x86
 __HAVE_ARCH_GENERIC_BOARD := y
  
 PLATFORM_RELFLAGS += -ffunction-sections -fvisibility=hidden
  
-PLATFORM_LDFLAGS += --emit-relocs -Bsymbolic -Bsymbolic-functions
+PLATFORM_LDFLAGS += --emit-relocs -Bsymbolic -Bsymbolic-functions -m elf_i386
  
 LDFLAGS_FINAL += --gc-sections -pie
 LDFLAGS_FINAL += --wrap=__divdi3 --wrap=__udivdi3
 LDFLAGS_FINAL += --wrap=__moddi3 --wrap=__umoddi3
  
-export NORMAL_LIBGCC = $(shell $(CC) $(CFLAGS) -print-libgcc-file-name)
+export NORMAL_LIBGCC = $(shell $(CC) $(PLATFORM_CPPFLAGS) -print-libgcc-file-name)
 CONFIG_USE_PRIVATE_LIBGCC := arch/x86/lib
@@ -7,7 +7,7 @@
  
 CROSS_COMPILE ?= i386-linux-
  
-PLATFORM_CPPFLAGS += -DCONFIG_X86 -D__I386__ -march=i386 -Werror
+PLATFORM_CPPFLAGS += -DCONFIG_X86 -D__I386__ -Werror
  
 # DO NOT MODIFY THE FOLLOWING UNLESS YOU REALLY KNOW WHAT YOU ARE DOING!
 LDPPFLAGS += -DRESET_SEG_START=0xffff0000
...	...	@@ -16,18 +16,19 @@
16	16	PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_X86)
17	17	PLATFORM_CPPFLAGS += -fno-dwarf2-cfi-asm
18	18	PLATFORM_CPPFLAGS += -DREALMODE_BASE=0x7c0
	19	+PLATFORM_CPPFLAGS += -march=i386 -m32
19	20
20	21	# Support generic board on x86
21	22	__HAVE_ARCH_GENERIC_BOARD := y
22	23
23	24	PLATFORM_RELFLAGS += -ffunction-sections -fvisibility=hidden
24	25
25		-PLATFORM_LDFLAGS += --emit-relocs -Bsymbolic -Bsymbolic-functions
	26	+PLATFORM_LDFLAGS += --emit-relocs -Bsymbolic -Bsymbolic-functions -m elf_i386
26	27
27	28	LDFLAGS_FINAL += --gc-sections -pie
28	29	LDFLAGS_FINAL += --wrap=__divdi3 --wrap=__udivdi3
29	30	LDFLAGS_FINAL += --wrap=__moddi3 --wrap=__umoddi3
30	31
31		-export NORMAL_LIBGCC = $(shell $(CC) $(CFLAGS) -print-libgcc-file-name)
	32	+export NORMAL_LIBGCC = $(shell $(CC) $(PLATFORM_CPPFLAGS) -print-libgcc-file-name)
32	33	CONFIG_USE_PRIVATE_LIBGCC := arch/x86/lib
...	...	@@ -7,7 +7,7 @@
7	7
8	8	CROSS_COMPILE ?= i386-linux-
9	9
10		-PLATFORM_CPPFLAGS += -DCONFIG_X86 -D__I386__ -march=i386 -Werror
	10	+PLATFORM_CPPFLAGS += -DCONFIG_X86 -D__I386__ -Werror
11	11
12	12	# DO NOT MODIFY THE FOLLOWING UNLESS YOU REALLY KNOW WHAT YOU ARE DOING!
13	13	LDPPFLAGS += -DRESET_SEG_START=0xffff0000