GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory. # Local configure fragment for sysdeps/arm. dnl It is always possible to access static and hidden symbols in an dnl position independent way. dnl NOTE: This feature was added by the GCC TLS patches. We should test for dnl it. Until we do, don't define it. #AC_DEFINE(PI_STATIC_AND_HIDDEN) # We check to see if the compiler and flags are # selecting the hard-float ABI and if they are then # we set libc_cv_arm_pcs_vfp to yes which causes # HAVE_ARM_PCS_VFP to be defined in config.h and # in include/libc-symbols.h and thus available to # shlib-versions to select the appropriate name for # the dynamic linker via %ifdef. AC_CACHE_CHECK([whether the compiler is using the ARM hard-float ABI], [libc_cv_arm_pcs_vfp], [AC_EGREP_CPP(yes,[#ifdef __ARM_PCS_VFP yes #endif ], libc_cv_arm_pcs_vfp=yes, libc_cv_arm_pcs_vfp=no)]) if test $libc_cv_arm_pcs_vfp = yes; then AC_DEFINE(HAVE_ARM_PCS_VFP) LIBC_CONFIG_VAR([default-abi], [hard]) else LIBC_CONFIG_VAR([default-abi], [soft]) fi AC_CACHE_CHECK([whether the build tools support the GNU descriptor TLS scheme], [libc_cv_arm_tls_desc], [old_CFLAGS="$CFLAGS" CFLAGS="$CFLAGS -mtls-dialect=gnu2" AC_COMPILE_IFELSE([AC_LANG_PROGRAM([asm (".word\tfoo(tlsdesc)");], [])], [libc_cv_arm_tls_desc=yes], [libc_cv_arm_tls_desc=no]) CFLAGS="$old_CFLAGS"]) if test $libc_cv_arm_tls_desc = yes; then LIBC_CONFIG_VAR([have-arm-tls-desc], [yes]) else LIBC_CONFIG_VAR([have-arm-tls-desc], [no]) fi libc_cv_gcc_unwind_find_fde=no # Remove -fno-unwind-tables that was added in sysdeps/arm/preconfigure.ac. CFLAGS=${CFLAGS% -fno-unwind-tables} dnl The normal configure check for gcc -fexecptions fails because it can't dnl find __aeabi_unwind_cpp_pr0. Work around this here; our GCC definitely dnl has -fexceptions. libc_cv_gcc_exceptions=yes exceptions=-fexceptions