| Message ID | 1375076435.4630.2.camel@phoenix |
|---|---|
| State | Not Applicable |
| Headers | show |
2013/7/29 Axel Lin <axel.lin@ingics.com>: > Hi, > I have BR2_BINFMT_FLAT=y in my setting. > However, the build system still generates ELF executable for busybox. > > $ file output/target/bin/busybox > output/target/bin/busybox: setuid ELF 32-bit LSB executable, ARM, version 1 (SYSV), statically linked, stripped Hi, In output/build/busybox-1.21.1/busybox_unstripped.out, I found below messages: /opt/test/buildroot/buildroot/output/host/usr/lib/gcc/arm-buildroot-uclinux-uclibcgnueabi/4.7.3/../../../../arm-buildroot-uclinux-uclibcgnueabi/bin/ld: warning: cannot find entry symbol lf2flt; defaulting to 00000000000080ac This looks like the linker does not understand -elf2flt and treat is as -e lf2flt. Any idea how to fix this? Thanks, Axel
2013/7/29 Axel Lin <axel.lin@ingics.com>: > 2013/7/29 Axel Lin <axel.lin@ingics.com>: >> Hi, >> I have BR2_BINFMT_FLAT=y in my setting. >> However, the build system still generates ELF executable for busybox. >> >> $ file output/target/bin/busybox >> output/target/bin/busybox: setuid ELF 32-bit LSB executable, ARM, version 1 (SYSV), statically linked, stripped Hi, Just try to figure out if any platform can build FLAT executable. So I just tested build for blackfin (BR2_bfin). ( I don't have any customization for this blackfin build test, only run make menuconfig and select blackfin. Test with current git tree. ) I thought I should have a FLAT executable, however it produces ELF executable. $ file output/target/bin/busybox output/target/bin/busybox: setuid ELF 32-bit LSB executable, Analog Devices Blackfin, version 1 (SYSV), statically linked, stripped BTW, I found BR2_ELF2FLT is invisible for BR2_bfin. package/elf2flt/Config.in.host: config BR2_PACKAGE_HOST_ELF2FLT bool "Enable elf2flt support?" depends on BR2_arm || BR2_sh || BR2_sparc Does this mean blackfin does not need elf2flt tool? Regards, Axel
Dear Axel Lin, On Wed, 31 Jul 2013 21:05:56 +0800, Axel Lin wrote: > Just try to figure out if any platform can build FLAT executable. > So I just tested build for blackfin (BR2_bfin). > ( I don't have any customization for this blackfin build test, > only run make menuconfig and select blackfin. Test with current git tree. ) > > I thought I should have a FLAT executable, however it produces ELF executable. > $ file output/target/bin/busybox > output/target/bin/busybox: setuid ELF 32-bit LSB executable, Analog > Devices Blackfin, version 1 (SYSV), statically linked, stripped Yeah, that's broken. > BTW, I found BR2_ELF2FLT is invisible for BR2_bfin. > > package/elf2flt/Config.in.host: > config BR2_PACKAGE_HOST_ELF2FLT > bool "Enable elf2flt support?" > depends on BR2_arm || BR2_sh || BR2_sparc > > Does this mean blackfin does not need elf2flt tool? No, it means that the internal toolchain handling of FLAT binaries and elf2flt is broken. Thomas
diff --git a/arch/Config.in b/arch/Config.in index 0b5b218..a894e17 100644 --- a/arch/Config.in +++ b/arch/Config.in @@ -216,7 +216,6 @@ config BR2_GCC_TARGET_MODE # Set up target binary format choice prompt "Target Binary Format" - depends on BR2_bfin || BR2_m68k default BR2_BINFMT_FDPIC config BR2_BINFMT_ELF @@ -229,7 +228,6 @@ config BR2_BINFMT_ELF config BR2_BINFMT_FDPIC bool "FDPIC" - depends on BR2_bfin || BR2_m68k help ELF FDPIC binaries are based on ELF, but allow the individual load segments of a binary to be located in memory independently of each @@ -238,7 +236,6 @@ config BR2_BINFMT_FDPIC config BR2_BINFMT_FLAT bool "FLAT" - depends on BR2_bfin || BR2_m68k select BR2_PREFER_STATIC_LIB help FLAT binary is a relatively simple and lightweight executable format diff --git a/package/Makefile.in b/package/Makefile.in index aed28d5..5b89e18 100644 --- a/package/Makefile.in +++ b/package/Makefile.in @@ -24,7 +24,7 @@ MAKE:=$(HOSTMAKE) -j$(PARALLEL_JOBS) GNU_TARGET_NAME=$(ARCH)-buildroot-$(TARGET_OS)-$(LIBC)$(ABI) # Blackfin FLAT needs uclinux -ifeq ($(BR2_bfin)$(BR2_BINFMT_FLAT),yy) +ifeq ($(BR2_BINFMT_FLAT),y) TARGET_OS=uclinux else TARGET_OS=linux diff --git a/package/busybox/busybox-1.21.x.config b/package/busybox/busybox-1.21.x.config index e46b528..4e692fc 100644 --- a/package/busybox/busybox-1.21.x.config +++ b/package/busybox/busybox-1.21.x.config @@ -55,9 +55,9 @@ CONFIG_FEATURE_SYSLOG=y # # Build Options # -# CONFIG_STATIC is not set +CONFIG_STATIC=y # CONFIG_PIE is not set -# CONFIG_NOMMU is not set +CONFIG_NOMMU=y # CONFIG_BUILD_LIBBUSYBOX is not set # CONFIG_FEATURE_INDIVIDUAL is not set # CONFIG_FEATURE_SHARED_BUSYBOX is not set diff --git a/package/uclibc/uClibc-0.9.33.config b/package/uclibc/uClibc-0.9.33.config index eb39df6..d0a9c0c 100644 --- a/package/uclibc/uClibc-0.9.33.config +++ b/package/uclibc/uClibc-0.9.33.config @@ -65,10 +65,10 @@ FORCE_OPTIONS_FOR_ARCH=y # ARCH_BIG_ENDIAN is not set # ARCH_WANTS_LITTLE_ENDIAN is not set # ARCH_WANTS_BIG_ENDIAN is not set -ARCH_HAS_MMU=y -ARCH_USE_MMU=y +# ARCH_HAS_MMU is not set +# ARCH_USE_MMU is not set UCLIBC_HAS_FLOATS=y -UCLIBC_HAS_FPU=y +# UCLIBC_HAS_FPU is not set DO_C99_MATH=y # DO_XSI_MATH is not set # UCLIBC_HAS_FENV is not set