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PR target/24837 * config.gcc: Define UCLIBC_DEFAULT to 0 or 1. * opth-gen.awk: Handle Var and InverseMask together. * config/linux.opt (muclibc, mglibc): Use Var(linux_uclibc). * config/linux.h: Use #if not #ifdef for testing UCLIBC_DEFAULT. (TARGET_C99_FUNCTIONS): Test OPTION_GLIBC not TARGET_GLIBC. (CHOOSE_DYNAMIC_LINKER): Give an error for -mglibc and -muclibc used together. (UCLIBC_DYNAMIC_LINKER32, UCLIBC_DYNAMIC_LINKER64, LINUX_DYNAMIC_LINKER32, LINUX_DYNAMIC_LINKER64): Define. * config/alpha/linux-elf.h (GLIBC_DYNAMIC_LINKER, UCLIBC_DYNAMIC_LINKER, CHOOSE_DYNAMIC_LINKER, LINUX_DYNAMIC_LINKER): Define. (ELF_DYNAMIC_LINKER): Define to LINUX_DYNAMIC_LINKER. * config/alpha/linux.h (TARGET_C99_FUNCTIONS): Define to TARGET_GLIBC. * config/cris/linux.h (GLIBC_DYNAMIC_LINKER): Define. (CRIS_LINK_SUBTARGET_SPEC): Pass a -dynamic-linker option. * config/frv/linux.h (GLIBC_DYNAMIC_LINKER): Define. (LINK_SPEC): Use LINUX_DYNAMIC_LINKER. (TARGET_C99_FUNCTIONS): Don't define. * config/i386/linux.h (DYNAMIC_LINKER): Rename to GLIBC_DYNAMIC_LINKER. (SUBTARGET_EXTRA_SPECS): Use LINUX_DYNAMIC_LINKER. * config/i386/linux64.h (GLIBC_DYNAMIC_LINKER32, GLIBC_DYNAMIC_LINKER64): Define. (LINK_SPEC): Use LINUX_DYNAMIC_LINKER32 and LINUX_DYNAMIC_LINKER64. * config/ia64/linux.h (GLIBC_DYNAMIC_LINKER): Define. (LINK_SPEC): Use LINUX_DYNAMIC_LINKER. * config/m32r/linux.h (GLIBC_DYNAMIC_LINKE): Define. (LINK_SPEC): Use LINUX_DYNAMIC_LINKER. * config/m68k/linux.h (GLIBC_DYNAMIC_LINKER): Define. (LINK_SPEC): Use LINUX_DYNAMIC_LINKER. * config/mips/linux64.h (GLIBC_DYNAMIC_LINKER32, GLIBC_DYNAMIC_LINKER64, GLIBC_DYNAMIC_LINKERN32, UCLIBC_DYNAMIC_LINKERN32, LINUX_DYNAMIC_LINKERN32): Define. (LINK_SPEC): Use LINUX_DYNAMIC_LINKERN32, LINUX_DYNAMIC_LINKER64 and LINUX_DYNAMIC_LINKER32. * config/mn10300/linux.h (GLIBC_DYNAMIC_LINKER): Define. (LINK_SPEC): Use LINUX_DYNAMIC_LINKER. * config/pa/pa-linux.h (GLIBC_DYNAMIC_LINKER): Define. (LINK_SPEC): Use LINUX_DYNAMIC_LINKER. * config/rs6000/linux.h (TARGET_C99_FUNCTIONS): Define to TARGET_GLIBC. * config/rs6000/linux64.h (TARGET_C99_FUNCTIONS): Likewise. (GLIBC_DYNAMIC_LINKER32, GLIBC_DYNAMIC_LINKER64, UCLIBC_DYNAMIC_LINKER32, UCLIBC_DYNAMIC_LINKER64, CHOOSE_DYNAMIC_LINKER, CHOOSE_DYNAMIC_LINKER, LINUX_DYNAMIC_LINKER32, LINUX_DYNAMIC_LINKER64): Define. (LINK_OS_LINUX_SPEC32): Use LINUX_DYNAMIC_LINKER32. (LINK_OS_LINUX_SPEC64): Use LINUX_DYNAMIC_LINKER64. * config/rs6000/sysv4.h (GLIBC_DYNAMIC_LINKER, UCLIBC_DYNAMIC_LINKER, CHOOSE_DYNAMIC_LINKER, LINUX_DYNAMIC_LINKER): Define. (LINK_OS_LINUX_SPEC): Use LINUX_DYNAMIC_LINKE. * config/s390/linux.h (GLIBC_DYNAMIC_LINKER32, GLIBC_DYNAMIC_LINKER64): Define. (LINK_SPEC): Use LINUX_DYNAMIC_LINKER32 and LINUX_DYNAMIC_LINKER64. * config/sh/linux.h (GLIBC_DYNAMIC_LINKER): Define. (SUBTARGET_LINK_SPEC): Use LINUX_DYNAMIC_LINKER. * config/sparc/linux.h (GLIBC_DYNAMIC_LINKER, UCLIBC_DYNAMIC_LINKER, CHOOSE_DYNAMIC_LINKER, LINUX_DYNAMIC_LINKER): Define. (LINK_SPEC): Use LINUX_DYNAMIC_LINKER. (TARGET_C99_FUNCTIONS): Define to TARGET_GLIBC. * config/sparc/linux64.h (GLIBC_DYNAMIC_LINKER32, GLIBC_DYNAMIC_LINKER64, UCLIBC_DYNAMIC_LINKER32, UCLIBC_DYNAMIC_LINKER64, CHOOSE_DYNAMIC_LINKER, LINUX_DYNAMIC_LINKER32, LINUX_DYNAMIC_LINKER64): Define. (LINK_ARCH32_SPEC): Use LINUX_DYNAMIC_LINKER32. (LINK_ARCH64_SPEC, LINK_SPEC): Use LINUX_DYNAMIC_LINKER64. (TARGET_C99_FUNCTIONS): Define to TARGET_GLIBC. * config/xtensa/linux.h (GLIBC_DYNAMIC_LINKER): Define. (LINK_SPEC): Use LINUX_DYNAMIC_LINKER. * doc/invoke.texi (-muclibc): Remove caveat about supported targets. testsuite: * gcc.dg/glibc-uclibc-1.c, gcc.dg/glibc-uclibc-2.c: New tests. From-SVN: r111235
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