Add musl support to gcc This patch comes from the musl-cross project at https://bitbucket.org/GregorR/musl-cross/src. Compared to the upstream version: * the config.sub modifications have been removed, because Buildroot already overwrites all config.sub with a more recent config.sub that has musl support. * change to ensure that a dummy dynamic linker path MUSL_DYNAMIC_LINKER is defined for all architectures, otherwise building gcc for architectures not supported by musl was causing build failure. Bug reported upstream at https://bitbucket.org/GregorR/musl-gcc-patches/issue/4/musl-gcc-patches-break-the-build-on. * change the USE_PT_GNU_EH_FRAME logic to keep the existing gcc logic and only add the musl one as an addition, not as a replacement. Not doing this breaks C++ exception handling with glibc, because USE_PT_GNU_EH_FRAME doesn't get defined due to the configure script not testing dl_iterate_phdr() on any system except Solaris. [Gustavo: remove upstream applied gcc/config/sh/sh.c chunk for 4.9.1] Signed-off-by: Thomas Petazzoni --- Index: b/fixincludes/mkfixinc.sh =================================================================== --- a/fixincludes/mkfixinc.sh +++ b/fixincludes/mkfixinc.sh @@ -19,7 +19,8 @@ powerpc-*-eabi* | \ powerpc-*-rtems* | \ powerpcle-*-eabisim* | \ - powerpcle-*-eabi* ) + powerpcle-*-eabi* | \ + *-musl* ) # IF there is no include fixing, # THEN create a no-op fixer and exit (echo "#! /bin/sh" ; echo "exit 0" ) > ${target} Index: b/gcc/config.gcc =================================================================== --- a/gcc/config.gcc +++ b/gcc/config.gcc @@ -594,7 +594,7 @@ esac # Common C libraries. -tm_defines="$tm_defines LIBC_GLIBC=1 LIBC_UCLIBC=2 LIBC_BIONIC=3" +tm_defines="$tm_defines LIBC_GLIBC=1 LIBC_UCLIBC=2 LIBC_BIONIC=3 LIBC_MUSL=4" # 32-bit x86 processors supported by --with-arch=. Each processor # MUST be separated by exactly one space. @@ -719,6 +719,9 @@ *-*-*uclibc*) tm_defines="$tm_defines DEFAULT_LIBC=LIBC_UCLIBC" ;; + *-*-*musl*) + tm_defines="$tm_defines DEFAULT_LIBC=LIBC_MUSL" + ;; *) tm_defines="$tm_defines DEFAULT_LIBC=LIBC_GLIBC" ;; @@ -2322,6 +2325,10 @@ powerpc*-*-linux*paired*) tm_file="${tm_file} rs6000/750cl.h" ;; esac + case ${target} in + *-linux*-musl*) + enable_secureplt=yes ;; + esac if test x${enable_secureplt} = xyes; then tm_file="rs6000/secureplt.h ${tm_file}" fi Index: b/gcc/config/aarch64/aarch64-linux.h =================================================================== --- a/gcc/config/aarch64/aarch64-linux.h +++ b/gcc/config/aarch64/aarch64-linux.h @@ -22,6 +22,8 @@ #define GCC_AARCH64_LINUX_H #define GLIBC_DYNAMIC_LINKER "/lib/ld-linux-aarch64%{mbig-endian:_be}.so.1" +#undef MUSL_DYNAMIC_LINKER +#define MUSL_DYNAMIC_LINKER "/lib/ld-musl-aarch64.so.1" #define CPP_SPEC "%{pthread:-D_REENTRANT}" Index: b/gcc/config/arm/linux-eabi.h =================================================================== --- a/gcc/config/arm/linux-eabi.h +++ b/gcc/config/arm/linux-eabi.h @@ -77,6 +77,23 @@ %{mfloat-abi=soft*:" GLIBC_DYNAMIC_LINKER_SOFT_FLOAT "} \ %{!mfloat-abi=*:" GLIBC_DYNAMIC_LINKER_DEFAULT "}" +/* For ARM musl currently supports four dynamic linkers: + - ld-musl-arm.so.1 - for the EABI-derived soft-float ABI + - ld-musl-armhf.so.1 - for the EABI-derived hard-float ABI + - ld-musl-armeb.so.1 - for the EABI-derived soft-float ABI, EB + - ld-musl-armebhf.so.1 - for the EABI-derived hard-float ABI, EB + musl does not support the legacy OABI mode. + All the dynamic linkers live in /lib. + We default to soft-float, EL. */ +#undef MUSL_DYNAMIC_LINKER +#if TARGET_BIG_ENDIAN_DEFAULT +#define MUSL_DYNAMIC_LINKER_E "%{mlittle-endian:;:eb}" +#else +#define MUSL_DYNAMIC_LINKER_E "%{mbig-endian:eb}" +#endif +#define MUSL_DYNAMIC_LINKER \ + "/lib/ld-musl-arm" MUSL_DYNAMIC_LINKER_E "%{mfloat-abi=hard:hf}.so.1" + /* At this point, bpabi.h will have clobbered LINK_SPEC. We want to use the GNU/Linux version, not the generic BPABI version. */ #undef LINK_SPEC Index: b/gcc/config/i386/linux.h =================================================================== --- a/gcc/config/i386/linux.h +++ b/gcc/config/i386/linux.h @@ -21,3 +21,5 @@ #define GNU_USER_LINK_EMULATION "elf_i386" #define GLIBC_DYNAMIC_LINKER "/lib/ld-linux.so.2" +#undef MUSL_DYNAMIC_LINKER +#define MUSL_DYNAMIC_LINKER "/lib/ld-musl-i386.so.1" Index: b/gcc/config/i386/linux64.h =================================================================== --- a/gcc/config/i386/linux64.h +++ b/gcc/config/i386/linux64.h @@ -30,3 +30,10 @@ #define GLIBC_DYNAMIC_LINKER32 "/lib/ld-linux.so.2" #define GLIBC_DYNAMIC_LINKER64 "/lib64/ld-linux-x86-64.so.2" #define GLIBC_DYNAMIC_LINKERX32 "/libx32/ld-linux-x32.so.2" + +#undef MUSL_DYNAMIC_LINKER32 +#define MUSL_DYNAMIC_LINKER32 "/lib/ld-musl-i386.so.1" +#undef MUSL_DYNAMIC_LINKER64 +#define MUSL_DYNAMIC_LINKER64 "/lib/ld-musl-x86_64.so.1" +#undef MUSL_DYNAMIC_LINKERX32 +#define MUSL_DYNAMIC_LINKERX32 "/lib/ld-musl-x32.so.1" Index: b/gcc/config/linux.h =================================================================== --- a/gcc/config/linux.h +++ b/gcc/config/linux.h @@ -32,10 +32,12 @@ #define OPTION_GLIBC (DEFAULT_LIBC == LIBC_GLIBC) #define OPTION_UCLIBC (DEFAULT_LIBC == LIBC_UCLIBC) #define OPTION_BIONIC (DEFAULT_LIBC == LIBC_BIONIC) +#define OPTION_MUSL (DEFAULT_LIBC == LIBC_MUSL) #else #define OPTION_GLIBC (linux_libc == LIBC_GLIBC) #define OPTION_UCLIBC (linux_libc == LIBC_UCLIBC) #define OPTION_BIONIC (linux_libc == LIBC_BIONIC) +#define OPTION_MUSL (linux_libc == LIBC_MUSL) #endif #define GNU_USER_TARGET_OS_CPP_BUILTINS() \ @@ -53,18 +55,21 @@ uClibc or Bionic is the default C library and whether -muclibc or -mglibc or -mbionic has been passed to change the default. */ -#define CHOOSE_DYNAMIC_LINKER1(LIBC1, LIBC2, LIBC3, LD1, LD2, LD3) \ - "%{" LIBC2 ":" LD2 ";:%{" LIBC3 ":" LD3 ";:" LD1 "}}" +#define CHOOSE_DYNAMIC_LINKER1(LIBC1, LIBC2, LIBC3, LIBC4, LD1, LD2, LD3, LD4) \ + "%{" LIBC2 ":" LD2 ";:%{" LIBC3 ":" LD3 ";:%{" LIBC4 ":" LD4 ";:" LD1 "}}}" #if DEFAULT_LIBC == LIBC_GLIBC -#define CHOOSE_DYNAMIC_LINKER(G, U, B) \ - CHOOSE_DYNAMIC_LINKER1 ("mglibc", "muclibc", "mbionic", G, U, B) +#define CHOOSE_DYNAMIC_LINKER(G, U, B, M) \ + CHOOSE_DYNAMIC_LINKER1 ("mglibc", "muclibc", "mbionic", "mmusl", G, U, B, M) #elif DEFAULT_LIBC == LIBC_UCLIBC -#define CHOOSE_DYNAMIC_LINKER(G, U, B) \ - CHOOSE_DYNAMIC_LINKER1 ("muclibc", "mglibc", "mbionic", U, G, B) +#define CHOOSE_DYNAMIC_LINKER(G, U, B, M) \ + CHOOSE_DYNAMIC_LINKER1 ("muclibc", "mglibc", "mbionic", "mmusl", U, G, B, M) #elif DEFAULT_LIBC == LIBC_BIONIC -#define CHOOSE_DYNAMIC_LINKER(G, U, B) \ - CHOOSE_DYNAMIC_LINKER1 ("mbionic", "mglibc", "muclibc", B, G, U) +#define CHOOSE_DYNAMIC_LINKER(G, U, B, M) \ + CHOOSE_DYNAMIC_LINKER1 ("mbionic", "mglibc", "muclibc", "mmusl", B, G, U, M) +#elif DEFAULT_LIBC == LIBC_MUSL +#define CHOOSE_DYNAMIC_LINKER(G, U, B, M) \ + CHOOSE_DYNAMIC_LINKER1 ("mmusl", "mglibc", "muclibc", "mbionic", M, G, U, B) #else #error "Unsupported DEFAULT_LIBC" #endif /* DEFAULT_LIBC */ @@ -82,23 +87,103 @@ #define BIONIC_DYNAMIC_LINKER64 "/system/bin/linker64" #define BIONIC_DYNAMIC_LINKERX32 "/system/bin/linkerx32" +/* Musl dynamic linker paths must be defined on a per-architecture + basis, for each architecture supported by Musl. However, in order + to let other architectures continue to build with other C + libraries, we provide a dummy definition of the following defines. */ +#define MUSL_DYNAMIC_LINKER "invalid" +#define MUSL_DYNAMIC_LINKER32 "invalid" +#define MUSL_DYNAMIC_LINKER64 "invalid" +#define MUSL_DYNAMIC_LINKERX32 "invalid" + #define GNU_USER_DYNAMIC_LINKER \ CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER, UCLIBC_DYNAMIC_LINKER, \ - BIONIC_DYNAMIC_LINKER) + BIONIC_DYNAMIC_LINKER, MUSL_DYNAMIC_LINKER) #define GNU_USER_DYNAMIC_LINKER32 \ CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER32, UCLIBC_DYNAMIC_LINKER32, \ - BIONIC_DYNAMIC_LINKER32) + BIONIC_DYNAMIC_LINKER32, MUSL_DYNAMIC_LINKER32) #define GNU_USER_DYNAMIC_LINKER64 \ CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER64, UCLIBC_DYNAMIC_LINKER64, \ - BIONIC_DYNAMIC_LINKER64) + BIONIC_DYNAMIC_LINKER64, MUSL_DYNAMIC_LINKER64) #define GNU_USER_DYNAMIC_LINKERX32 \ CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKERX32, UCLIBC_DYNAMIC_LINKERX32, \ - BIONIC_DYNAMIC_LINKERX32) + BIONIC_DYNAMIC_LINKERX32, MUSL_DYNAMIC_LINKER32) /* Whether we have Bionic libc runtime */ #undef TARGET_HAS_BIONIC #define TARGET_HAS_BIONIC (OPTION_BIONIC) +/* musl avoids problematic includes by rearranging the include directories. + * Unfortunately, this is mostly duplicated from cppdefault.c */ +#if DEFAULT_LIBC == LIBC_MUSL +#define INCLUDE_DEFAULTS_MUSL_GPP \ + { GPLUSPLUS_INCLUDE_DIR, "G++", 1, 1, \ + GPLUSPLUS_INCLUDE_DIR_ADD_SYSROOT, 0 }, \ + { GPLUSPLUS_TOOL_INCLUDE_DIR, "G++", 1, 1, \ + GPLUSPLUS_INCLUDE_DIR_ADD_SYSROOT, 1 }, \ + { GPLUSPLUS_BACKWARD_INCLUDE_DIR, "G++", 1, 1, \ + GPLUSPLUS_INCLUDE_DIR_ADD_SYSROOT, 0 }, + +#ifdef LOCAL_INCLUDE_DIR +#define INCLUDE_DEFAULTS_MUSL_LOCAL \ + { LOCAL_INCLUDE_DIR, 0, 0, 1, 1, 2 }, \ + { LOCAL_INCLUDE_DIR, 0, 0, 1, 1, 0 }, +#else +#define INCLUDE_DEFAULTS_MUSL_LOCAL +#endif + +#ifdef PREFIX_INCLUDE_DIR +#define INCLUDE_DEFAULTS_MUSL_PREFIX \ + { PREFIX_INCLUDE_DIR, 0, 0, 1, 0, 0}, +#else +#define INCLUDE_DEFAULTS_MUSL_PREFIX +#endif + +#ifdef CROSS_INCLUDE_DIR +#define INCLUDE_DEFAULTS_MUSL_CROSS \ + { CROSS_INCLUDE_DIR, "GCC", 0, 0, 0, 0}, +#else +#define INCLUDE_DEFAULTS_MUSL_CROSS +#endif + +#ifdef TOOL_INCLUDE_DIR +#define INCLUDE_DEFAULTS_MUSL_TOOL \ + { TOOL_INCLUDE_DIR, "BINUTILS", 0, 1, 0, 0}, +#else +#define INCLUDE_DEFAULTS_MUSL_TOOL +#endif + +#ifdef NATIVE_SYSTEM_HEADER_DIR +#define INCLUDE_DEFAULTS_MUSL_NATIVE \ + { NATIVE_SYSTEM_HEADER_DIR, 0, 0, 0, 1, 2 }, \ + { NATIVE_SYSTEM_HEADER_DIR, 0, 0, 0, 1, 0 }, +#else +#define INCLUDE_DEFAULTS_MUSL_NATIVE +#endif + +#if defined (CROSS_DIRECTORY_STRUCTURE) && !defined (TARGET_SYSTEM_ROOT) +# undef INCLUDE_DEFAULTS_MUSL_LOCAL +# define INCLUDE_DEFAULTS_MUSL_LOCAL +# undef INCLUDE_DEFAULTS_MUSL_NATIVE +# define INCLUDE_DEFAULTS_MUSL_NATIVE +#else +# undef INCLUDE_DEFAULTS_MUSL_CROSS +# define INCLUDE_DEFAULTS_MUSL_CROSS +#endif + +#undef INCLUDE_DEFAULTS +#define INCLUDE_DEFAULTS \ + { \ + INCLUDE_DEFAULTS_MUSL_GPP \ + INCLUDE_DEFAULTS_MUSL_PREFIX \ + INCLUDE_DEFAULTS_MUSL_CROSS \ + INCLUDE_DEFAULTS_MUSL_TOOL \ + INCLUDE_DEFAULTS_MUSL_NATIVE \ + { GCC_INCLUDE_DIR, "GCC", 0, 1, 0, 0 }, \ + { 0, 0, 0, 0, 0, 0 } \ + } +#endif + #if (DEFAULT_LIBC == LIBC_UCLIBC) && defined (SINGLE_LIBC) /* uClinux */ /* This is a *uclinux* target. We don't define below macros to normal linux versions, because doing so would require *uclinux* targets to include Index: b/gcc/config/linux.opt =================================================================== --- a/gcc/config/linux.opt +++ b/gcc/config/linux.opt @@ -30,3 +30,7 @@ muclibc Target Report RejectNegative Var(linux_libc,LIBC_UCLIBC) Negative(mbionic) Use uClibc C library + +mmusl +Target Report RejectNegative Var(linux_libc,LIBC_MUSL) Negative(mglibc) +Use musl C library Index: b/gcc/config/microblaze/linux.h =================================================================== --- a/gcc/config/microblaze/linux.h +++ b/gcc/config/microblaze/linux.h @@ -25,7 +25,23 @@ #undef TLS_NEEDS_GOT #define TLS_NEEDS_GOT 1 -#define DYNAMIC_LINKER "/lib/ld.so.1" +#if TARGET_BIG_ENDIAN_DEFAULT == 0 /* LE */ +#define MUSL_DYNAMIC_LINKER_E "%{EB:;:el}" +#else +#define MUSL_DYNAMIC_LINKER_E "%{EL:el}" +#endif + +#undef MUSL_DYNAMIC_LINKER +#define MUSL_DYNAMIC_LINKER "/lib/ld-musl-microblaze" MUSL_DYNAMIC_LINKER_E ".so.1" +#define GLIBC_DYNAMIC_LINKER "/lib/ld.so.1" + +#if DEFAULT_LIBC == LIBC_MUSL +#define DYNAMIC_LINKER MUSL_DYNAMIC_LINKER +#else +#define DYNAMIC_LINKER GLIBC_DYNAMIC_LINKER +#endif + + #undef SUBTARGET_EXTRA_SPECS #define SUBTARGET_EXTRA_SPECS \ { "dynamic_linker", DYNAMIC_LINKER } Index: b/gcc/config/rs6000/linux64.h =================================================================== --- a/gcc/config/rs6000/linux64.h +++ b/gcc/config/rs6000/linux64.h @@ -375,17 +375,23 @@ #endif #define UCLIBC_DYNAMIC_LINKER32 "/lib/ld-uClibc.so.0" #define UCLIBC_DYNAMIC_LINKER64 "/lib/ld64-uClibc.so.0" +#undef MUSL_DYNAMIC_LINKER32 +#define MUSL_DYNAMIC_LINKER32 "/lib/ld-musl-powerpc.so.1" +#undef MUSL_DYNAMIC_LINKER64 +#define MUSL_DYNAMIC_LINKER64 "/lib/ld-musl-powerpc64.so.1" #if DEFAULT_LIBC == LIBC_UCLIBC -#define CHOOSE_DYNAMIC_LINKER(G, U) "%{mglibc:" G ";:" U "}" +#define CHOOSE_DYNAMIC_LINKER(G, U, M) "%{mglibc:" G ";:%{mmusl:" M ";:" U "}}" #elif DEFAULT_LIBC == LIBC_GLIBC -#define CHOOSE_DYNAMIC_LINKER(G, U) "%{muclibc:" U ";:" G "}" +#define CHOOSE_DYNAMIC_LINKER(G, U, M) "%{muclibc:" U ";:%{mmusl:" M ";:" G "}}" +#elif DEFAULT_LIBC == LIBC_MUSL +#define CHOOSE_DYNAMIC_LINKER(G, U, M) "%{mglibc:" G ";:%{muclibc:" U ";:" M "}}" #else #error "Unsupported DEFAULT_LIBC" #endif #define GNU_USER_DYNAMIC_LINKER32 \ - CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER32, UCLIBC_DYNAMIC_LINKER32) + CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER32, UCLIBC_DYNAMIC_LINKER32, MUSL_DYNAMIC_LINKER32) #define GNU_USER_DYNAMIC_LINKER64 \ - CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER64, UCLIBC_DYNAMIC_LINKER64) + CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER64, UCLIBC_DYNAMIC_LINKER64, MUSL_DYNAMIC_LINKER64) #undef DEFAULT_ASM_ENDIAN #if (TARGET_DEFAULT & MASK_LITTLE_ENDIAN) Index: b/gcc/config/rs6000/secureplt.h =================================================================== --- a/gcc/config/rs6000/secureplt.h +++ b/gcc/config/rs6000/secureplt.h @@ -18,3 +18,4 @@ . */ #define CC1_SECURE_PLT_DEFAULT_SPEC "-msecure-plt" +#define LINK_SECURE_PLT_DEFAULT_SPEC "--secure-plt" Index: b/gcc/config/rs6000/sysv4.h =================================================================== --- a/gcc/config/rs6000/sysv4.h +++ b/gcc/config/rs6000/sysv4.h @@ -537,6 +537,9 @@ #ifndef CC1_SECURE_PLT_DEFAULT_SPEC #define CC1_SECURE_PLT_DEFAULT_SPEC "" #endif +#ifndef LINK_SECURE_PLT_DEFAULT_SPEC +#define LINK_SECURE_PLT_DEFAULT_SPEC "" +#endif /* Pass -G xxx to the compiler. */ #define CC1_SPEC "%{G*} %(cc1_cpu)" \ @@ -585,7 +588,8 @@ /* Override the default target of the linker. */ #define LINK_TARGET_SPEC \ - ENDIAN_SELECT("", " --oformat elf32-powerpcle", "") + ENDIAN_SELECT("", " --oformat elf32-powerpcle", "") \ + "%{!mbss-plt: %{!msecure-plt: %(link_secure_plt_default)}}" /* Any specific OS flags. */ #define LINK_OS_SPEC "\ @@ -763,15 +767,18 @@ #define GLIBC_DYNAMIC_LINKER "/lib/ld.so.1" #define UCLIBC_DYNAMIC_LINKER "/lib/ld-uClibc.so.0" +#define MUSL_DYNAMIC_LINKER "/lib/ld-musl-powerpc.so.1" #if DEFAULT_LIBC == LIBC_UCLIBC -#define CHOOSE_DYNAMIC_LINKER(G, U) "%{mglibc:" G ";:" U "}" +#define CHOOSE_DYNAMIC_LINKER(G, U, M) "%{mglibc:" G ";:%{mmusl:" M ";:" U "}}" +#elif DEFAULT_LIBC == LIBC_MUSL +#define CHOOSE_DYNAMIC_LINKER(G, U, M) "%{mglibc:" G ";:%{muclibc:" U ";:" M "}}" #elif !defined (DEFAULT_LIBC) || DEFAULT_LIBC == LIBC_GLIBC -#define CHOOSE_DYNAMIC_LINKER(G, U) "%{muclibc:" U ";:" G "}" +#define CHOOSE_DYNAMIC_LINKER(G, U, M) "%{muclibc:" U ";:%{mmusl:" M ";:" G "}}" #else #error "Unsupported DEFAULT_LIBC" #endif #define GNU_USER_DYNAMIC_LINKER \ - CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER, UCLIBC_DYNAMIC_LINKER) + CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER, UCLIBC_DYNAMIC_LINKER, MUSL_DYNAMIC_LINKER) #define LINK_OS_LINUX_SPEC "-m elf32ppclinux %{!shared: %{!static: \ %{rdynamic:-export-dynamic} \ @@ -894,6 +901,7 @@ { "link_os_openbsd", LINK_OS_OPENBSD_SPEC }, \ { "link_os_default", LINK_OS_DEFAULT_SPEC }, \ { "cc1_secure_plt_default", CC1_SECURE_PLT_DEFAULT_SPEC }, \ + { "link_secure_plt_default", LINK_SECURE_PLT_DEFAULT_SPEC }, \ { "cpp_os_ads", CPP_OS_ADS_SPEC }, \ { "cpp_os_yellowknife", CPP_OS_YELLOWKNIFE_SPEC }, \ { "cpp_os_mvme", CPP_OS_MVME_SPEC }, \ Index: b/gcc/config/sh/linux.h =================================================================== --- a/gcc/config/sh/linux.h +++ b/gcc/config/sh/linux.h @@ -43,7 +43,15 @@ #define TARGET_ASM_FILE_END file_end_indicate_exec_stack +#if TARGET_BIG_ENDIAN_DEFAULT /* BE */ +#define MUSL_DYNAMIC_LINKER_E "eb" +#else +#define MUSL_DYNAMIC_LINKER_E +#endif + #define GLIBC_DYNAMIC_LINKER "/lib/ld-linux.so.2" +#undef MUSL_DYNAMIC_LINKER +#define MUSL_DYNAMIC_LINKER "/lib/ld-musl-sh" MUSL_DYNAMIC_LINKER_E ".so.1" #undef SUBTARGET_LINK_EMUL_SUFFIX #define SUBTARGET_LINK_EMUL_SUFFIX "_linux" Index: b/gcc/configure =================================================================== --- a/gcc/configure +++ b/gcc/configure @@ -27449,6 +27453,9 @@ gcc_cv_target_dl_iterate_phdr=no fi ;; + *-linux-musl*) + gcc_cv_target_dl_iterate_phdr=yes + ;; esac if test x$gcc_cv_target_dl_iterate_phdr = xyes; then Index: b/gcc/configure.ac =================================================================== --- a/gcc/configure.ac +++ b/gcc/configure.ac @@ -5108,6 +5112,9 @@ gcc_cv_target_dl_iterate_phdr=no fi ;; + *-linux-musl*) + gcc_cv_target_dl_iterate_phdr=yes + ;; esac GCC_TARGET_TEMPLATE([TARGET_DL_ITERATE_PHDR]) if test x$gcc_cv_target_dl_iterate_phdr = xyes; then Index: b/gcc/ginclude/stddef.h =================================================================== --- a/gcc/ginclude/stddef.h +++ b/gcc/ginclude/stddef.h @@ -181,6 +181,7 @@ #ifndef _GCC_SIZE_T #ifndef _SIZET_ #ifndef __size_t +#ifndef __DEFINED_size_t /* musl */ #define __size_t__ /* BeOS */ #define __SIZE_T__ /* Cray Unicos/Mk */ #define _SIZE_T @@ -197,6 +198,7 @@ #define ___int_size_t_h #define _GCC_SIZE_T #define _SIZET_ +#define __DEFINED_size_t /* musl */ #if (defined (__FreeBSD__) && (__FreeBSD__ >= 5)) \ || defined(__FreeBSD_kernel__) /* __size_t is a typedef on FreeBSD 5, must not trash it. */ @@ -214,6 +216,7 @@ typedef long ssize_t; #endif /* __BEOS__ */ #endif /* !(defined (__GNUG__) && defined (size_t)) */ +#endif /* __DEFINED_size_t */ #endif /* __size_t */ #endif /* _SIZET_ */ #endif /* _GCC_SIZE_T */ Index: b/libgcc/unwind-dw2-fde-dip.c =================================================================== --- a/libgcc/unwind-dw2-fde-dip.c +++ b/libgcc/unwind-dw2-fde-dip.c @@ -73,6 +73,13 @@ && defined(TARGET_DL_ITERATE_PHDR) \ && defined(__sun__) && defined(__svr4__) # define USE_PT_GNU_EH_FRAME + #endif + +/* For musl libc, TARGET_DL_ITERATE_PHDR gets defined by the configure + script. */ +#if !defined(inhibit_libc) && defined(HAVE_LD_EH_FRAME_HDR) \ + && defined(TARGET_DL_ITERATE_PHDR) +# define USE_PT_GNU_EH_FRAME #endif #if defined(USE_PT_GNU_EH_FRAME) Index: b/libgomp/config/posix/time.c =================================================================== --- a/libgomp/config/posix/time.c +++ b/libgomp/config/posix/time.c @@ -28,6 +28,8 @@ The following implementation uses the most simple POSIX routines. If present, POSIX 4 clocks should be used instead. */ +#define _POSIX_C_SOURCE 199309L /* for clocks */ + #include "libgomp.h" #include #if TIME_WITH_SYS_TIME Index: b/libitm/config/arm/hwcap.cc =================================================================== --- a/libitm/config/arm/hwcap.cc +++ b/libitm/config/arm/hwcap.cc @@ -40,7 +40,11 @@ #ifdef __linux__ #include +#ifdef __GLIBC__ #include +#else +#include +#endif #include static void __attribute__((constructor)) Index: b/libitm/config/linux/x86/tls.h =================================================================== --- a/libitm/config/linux/x86/tls.h +++ b/libitm/config/linux/x86/tls.h @@ -25,16 +25,19 @@ #ifndef LIBITM_X86_TLS_H #define LIBITM_X86_TLS_H 1 -#if defined(__GLIBC_PREREQ) && __GLIBC_PREREQ(2, 10) +#if defined(__GLIBC_PREREQ) +#if __GLIBC_PREREQ(2, 10) /* Use slots in the TCB head rather than __thread lookups. GLIBC has reserved words 10 through 13 for TM. */ #define HAVE_ARCH_GTM_THREAD 1 #define HAVE_ARCH_GTM_THREAD_DISP 1 #endif +#endif #include "config/generic/tls.h" -#if defined(__GLIBC_PREREQ) && __GLIBC_PREREQ(2, 10) +#if defined(__GLIBC_PREREQ) +#if __GLIBC_PREREQ(2, 10) namespace GTM HIDDEN { #ifdef __x86_64__ @@ -101,5 +104,6 @@ } // namespace GTM #endif /* >= GLIBC 2.10 */ +#endif #endif // LIBITM_X86_TLS_H Index: b/libstdc++-v3/configure.host =================================================================== --- a/libstdc++-v3/configure.host +++ b/libstdc++-v3/configure.host @@ -264,6 +264,13 @@ os_include_dir="os/bsd/freebsd" ;; gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu) + # check for musl by target + case "${host_os}" in + *-musl*) + os_include_dir="os/generic" + ;; + *) + if [ "$uclibc" = "yes" ]; then os_include_dir="os/uclibc" elif [ "$bionic" = "yes" ]; then @@ -272,6 +279,9 @@ os_include_dir="os/gnu-linux" fi ;; + + esac + ;; hpux*) os_include_dir="os/hpux" ;; Index: b/gcc/config/mips/linux64.h =================================================================== --- a/gcc/config/mips/linux64.h +++ b/gcc/config/mips/linux64.h @@ -41,4 +41,4 @@ #define BIONIC_DYNAMIC_LINKERN32 "/system/bin/linker32" #define GNU_USER_DYNAMIC_LINKERN32 \ CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKERN32, UCLIBC_DYNAMIC_LINKERN32, \ - BIONIC_DYNAMIC_LINKERN32) + BIONIC_DYNAMIC_LINKERN32, MUSL_DYNAMIC_LINKER) Index: b/gcc/config/mips/linux.h =================================================================== --- a/gcc/config/mips/linux.h +++ b/gcc/config/mips/linux.h @@ -23,3 +23,11 @@ #undef UCLIBC_DYNAMIC_LINKER #define UCLIBC_DYNAMIC_LINKER \ "%{mnan=2008:/lib/ld-uClibc-mipsn8.so.0;:/lib/ld-uClibc.so.0}" + +#if TARGET_ENDIAN_DEFAULT == 0 /* LE */ +#define MUSL_DYNAMIC_LINKER_E "%{EB:;:el}" +#else +#define MUSL_DYNAMIC_LINKER_E "%{EL:el}" +#endif +#undef MUSL_DYNAMIC_LINKER +#define MUSL_DYNAMIC_LINKER "/lib/ld-musl-mips" MUSL_DYNAMIC_LINKER_E "%{msoft-float:-sf}.so.1"