Compiling
如何為 cortex-m7 (-march=armv7-m) 編譯busybox？
我正在嘗試在我的 waveshare stm32 開發板上執行busybox，但我的 SOC 具有“armv7-m”架構而不是“armv7-a”。所以我把遊行標誌放在了 busybox 的 menuconfig 中
(-march=armv7-m) Additional CFLAGS。但是當我試圖編譯它時，它會Conflicting architecture profiles M/A在連結時為每個文件拋出數千次這個錯誤。所以，我決定也(-march=armv7-m) Additional LDFLAGS為連結器設置這個標誌，但它沒有幫助。我的平台：
Host: | OS: Ubuntu 20 LTS | Kernel: Microsoft WSL2 Linux Kernel | Cross compile Toolchain: Linaro latest stable version |__ Target: | Board: Waveshare CoreH7XXI | SOC: stm32h743 (Single Core Cortex M7 @400MHz) | Architecture: ARMV7-M | Onboard DRAM: 8MB - 400KB(reserved by u-boot) = 7.6MB | Linux Kernel: 5.8.10 (stable 2020-09-17) | Busybox: latest stable version |__makefile 日誌（太長了，所以我刪除了它的中間部分）：
LINK busybox_unstripped Your linker does not support --sort-section,alignment Your linker does not support --sort-common Static linking against glibc, can't use --gc-sections Trying libraries: m resolv rt Failed: -Wl,--start-group -lm -lresolv -lrt -Wl,--end-group Output of: arm-linux-gnueabihf-gcc -Wall -Wshadow -Wwrite-strings -Wundef -Wstrict-prototypes -Wunused -Wunused-parameter -Wunused-function -Wunused-value -Wmissing-prototypes -Wmissing-declarations -Wno-format-security -Wdeclaration-after-statement -Wold-style-definition -finline-limit=0 -fno-builtin-strlen -fomit-frame-pointer -ffunction-sections -fdata-sections -fno-guess-branch-probability -funsigned-char -static-libgcc -falign-functions=1 -falign-jumps=1 -falign-labels=1 -falign-loops=1 -fno-unwind-tables -fno-asynchronous-unwind-tables -fno-builtin-printf -Os -march=armv7-m -static -march=armv7-m -o busybox_unstripped -Wl,--start-group applets/built-in.o archival/lib.a archival/libarchive/lib.a console-tools/lib.a coreutils/lib.a coreutils/libcoreutils/lib.a debianutils/lib.a klibc-utils/lib.a e2fsprogs/lib.a editors/lib.a findutils/lib.a init/lib.a libbb/lib.a libpwdgrp/lib.a loginutils/lib.a mailutils/lib.a miscutils/lib.a modutils/lib.a networking/lib.a networking/libiproute/lib.a networking/udhcp/lib.a printutils/lib.a procps/lib.a runit/lib.a selinux/lib.a shell/lib.a sysklogd/lib.a util-linux/lib.a util-linux/volume_id/lib.a archival/built-in.o archival/libarchive/built-in.o console-tools/built-in.o coreutils/built-in.o coreutils/libcoreutils/built-in.o debianutils/built-in.o klibc-utils/built-in.o e2fsprogs/built-in.o editors/built-in.o findutils/built-in.o init/built-in.o libbb/built-in.o libpwdgrp/built-in.o loginutils/built-in.o mailutils/built-in.o miscutils/built-in.o modutils/built-in.o networking/built-in.o networking/libiproute/built-in.o networking/udhcp/built-in.o printutils/built-in.o procps/built-in.o runit/built-in.o selinux/built-in.o shell/built-in.o sysklogd/built-in.o util-linux/built-in.o util-linux/volume_id/built-in.o -Wl,--end-group -Wl,--start-group -lm -lresolv -lrt -Wl,--end-group ========== libbb/lib.a(inet_common.o): In function `INET6_resolve': inet_common.c:(.text.INET6_resolve+0x22): warning: Using 'getaddrinfo' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking coreutils/lib.a(mktemp.o): In function `mktemp_main': mktemp.c:(.text.mktemp_main+0x4e): warning: the use of `mktemp' is dangerous, better use `mkstemp' networking/lib.a(ipcalc.o): In function `ipcalc_main': ipcalc.c:(.text.ipcalc_main+0x148): warning: Using 'gethostbyaddr' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking libbb/lib.a(inet_common.o): In function `INET_resolve': inet_common.c:(.text.INET_resolve+0x2c): warning: Using 'gethostbyname' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking networking/lib.a(inetd.o): In function `reread_config_file': inetd.c:(.text.reread_config_file+0x152): warning: Using 'getservbyname' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking networking/lib.a(netstat.o): In function `ip_port_str': netstat.c:(.text.ip_port_str+0x2c): warning: Using 'getservbyport' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking /opt/gcc-arm-linux/bin/../lib/gcc/arm-linux-gnueabihf/5.4.1/../../../../arm-linux-gnueabihf/bin/ld: error: applets/built-in.o: Conflicting architecture profiles M/A /opt/gcc-arm-linux/bin/../lib/gcc/arm-linux-gnueabihf/5.4.1/../../../../arm-linux-gnueabihf/bin/ld: failed to merge target specific data of file applets/built-in.o /opt/gcc-arm-linux/bin/../lib/gcc/arm-linux-gnueabihf/5.4.1/../../../../arm-linux-gnueabihf/bin/ld: error: libbb/lib.a(appletlib.o): Conflicting architecture profiles M/A /opt/gcc-arm-linux/bin/../lib/gcc/arm-linux-gnueabihf/5.4.1/../../../../arm-linux-gnueabihf/bin/ld: failed to merge target specific data of file libbb/lib.a(appletlib.o) /opt/gcc-arm-linux/bin/../lib/gcc/arm-linux-gnueabihf/5.4.1/../../../../arm-linux-gnueabihf/bin/ld: error: libbb/lib.a(compare_string_array.o): Conflicting architecture profiles M/A /opt/gcc-arm-linux/bin/../lib/gcc/arm-linux-gnueabihf/5.4.1/../../../../arm-linux-gnueabihf/bin/ld: failed to merge target specific data of file libbb/lib.a(compare_string_array.o) /opt/gcc-arm-linux/bin/../lib/gcc/arm-linux-gnueabihf/5.4.1/../../../../arm-linux-gnueabihf/bin/ld: error: libbb/lib.a(concat_path_file.o): Conflicting architecture profiles M/A /opt/gcc-arm-linux/bin/../lib/gcc/arm-linux-gnueabihf/5.4.1/../../../../arm-linux-gnueabihf/bin/ld: failed to merge target specific data of file libbb/lib.a(concat_path_file.o) /opt/gcc-arm-linux/bin/../lib/gcc/arm-linux-gnueabihf/5.4.1/../../../../arm-linux-gnueabihf/bin/ld: error: libbb/lib.a(default_error_retval.o): Conflicting architecture profiles M/A /opt/gcc-arm-linux/bin/../lib/gcc/arm-linux-gnueabihf/5.4.1/../../../../arm-linux-gnueabihf/bin/ld: failed to merge target specific data of file libbb/lib.a(default_error_retval.o) /opt/gcc-arm-linux/bin/../lib/gcc/arm-linux-gnueabihf/5.4.1/../../../../arm-linux-gnueabihf/bin/ld: error: libbb/lib.a(get_last_path_component.o): Conflicting architecture profiles M/A /opt/gcc-arm-linux/bin/../lib/gcc/arm-linux-gnueabihf/5.4.1/../../../../arm-linux-gnueabihf/bin/ld: failed to merge target specific data of file libbb/lib.a(get_last_path_component.o) /opt/gcc-arm-linux/bin/../lib/gcc/arm-linux-gnueabihf/5.4.1/../../../../arm-linux-gnueabihf/bin/ld: error: libbb/lib.a(last_char_is.o): Conflicting architecture profiles M/A /opt/gcc-arm-linux/bin/../lib/gcc/arm-linux-gnueabihf/5.4.1/../../../../arm-linux-gnueabihf/bin/ld: failed to merge target specific data of file libbb/lib.a(last_char_is.o) . . . . . /opt/gcc-arm-linux/bin/../lib/gcc/arm-linux-gnueabihf/5.4.1/../../../../arm-linux-gnueabihf/bin/ld: failed to merge target specific data of file libbb/lib.a(xgethostbyname.o) /opt/gcc-arm-linux/bin/../lib/gcc/arm-linux-gnueabihf/5.4.1/../../../../arm-linux-gnueabihf/bin/ld: error: libbb/lib.a(xrealloc_vector.o): Conflicting architecture profiles M/A /opt/gcc-arm-linux/bin/../lib/gcc/arm-linux-gnueabihf/5.4.1/../../../../arm-linux-gnueabihf/bin/ld: failed to merge target specific data of file libbb/lib.a(xrealloc_vector.o) /opt/gcc-arm-linux/bin/../lib/gcc/arm-linux-gnueabihf/5.4.1/../../../../arm-linux-gnueabihf/bin/ld: error: libbb/lib.a(xregcomp.o): Conflicting architecture profiles M/A /opt/gcc-arm-linux/bin/../lib/gcc/arm-linux-gnueabihf/5.4.1/../../../../arm-linux-gnueabihf/bin/ld: failed to merge target specific data of file libbb/lib.a(xregcomp.o) /opt/gcc-arm-linux/bin/../lib/gcc/arm-linux-gnueabihf/5.4.1/../../../../arm-linux-gnueabihf/bin/ld: error: libbb/lib.a(perror_nomsg.o): Conflicting architecture profiles M/A /opt/gcc-arm-linux/bin/../lib/gcc/arm-linux-gnueabihf/5.4.1/../../../../arm-linux-gnueabihf/bin/ld: failed to merge target specific data of file libbb/lib.a(perror_nomsg.o) collect2: error: ld returned 1 exit status Note: if build needs additional libraries, put them in CONFIG_EXTRA_LDLIBS. Example: CONFIG_EXTRA_LDLIBS="pthread dl tirpc audit pam" make: *** [Makefile:718: busybox_unstripped] Error 1在不添加
arm-v7-m標誌的情況下，它為皮質 A 編譯它：$ readelf -A busybox Attribute Section: aeabi File Attributes Tag_CPU_name: "7-A" Tag_CPU_arch: v7 Tag_CPU_arch_profile: Application Tag_ARM_ISA_use: Yes Tag_THUMB_ISA_use: Thumb-2 Tag_FP_arch: VFPv3 Tag_Advanced_SIMD_arch: NEONv1 Tag_ABI_PCS_wchar_t: 4 Tag_ABI_FP_rounding: Needed Tag_ABI_FP_denormal: Needed Tag_ABI_FP_exceptions: Needed Tag_ABI_FP_number_model: IEEE 754 Tag_ABI_align_needed: 8-byte Tag_ABI_align_preserved: 8-byte, except leaf SP Tag_ABI_enum_size: int Tag_ABI_VFP_args: VFP registers Tag_CPU_unaligned_access: v6
您應該使用
-mcpuflag 而不是-march.例子：
-mcpu=cortex-m7