diff options
Diffstat (limited to 'ports/sysdeps/arm/configure.in')
| -rw-r--r-- | ports/sysdeps/arm/configure.in | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/ports/sysdeps/arm/configure.in b/ports/sysdeps/arm/configure.in new file mode 100644 index 0000000000..64cef5f94e --- /dev/null +++ b/ports/sysdeps/arm/configure.in @@ -0,0 +1,68 @@ +GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory. +# Local configure fragment for sysdeps/arm. + +# Check for support of thread-local storage handling in assembler and +# linker. +AC_CACHE_CHECK(for ARM TLS support, libc_cv_arm_tls, [dnl +cat > conftest.s <<\EOF + .section ".tdata", "awT", %progbits + .globl foo +foo: .long 1 + .section ".tbss", "awT", %nobits + .globl bar +bar: .skip 4 + .text +.word foo(tpoff) +.word foo(tlsgd) +EOF +dnl +if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then + libc_cv_arm_tls=yes +else + libc_cv_arm_tls=no +fi +rm -f conftest*]) +if test $libc_cv_arm_tls = no; then + AC_MSG_ERROR([the assembler must support TLS]) +fi + +dnl It is always possible to access static and hidden symbols in an +dnl position independent way. +dnl NOTE: This feature was added by the GCC TLS patches. We should test for +dnl it. Until we do, don't define it. +#AC_DEFINE(PI_STATIC_AND_HIDDEN) + +AC_CACHE_CHECK([whether the CFI directive .cfi_sections is supported], + [libc_cv_asm_cfi_directive_sections], + [cat > conftest.s <<EOF + .text + .cfi_sections .debug_frame, .eh_frame + .cfi_startproc + .cfi_endproc +EOF + if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then + libc_cv_asm_cfi_directive_sections=yes + else + libc_cv_asm_cfi_directive_sections=no + fi + rm -f conftest*]) +if test $libc_cv_asm_cfi_directive_sections != yes; then + AC_MSG_ERROR([need .cfi_sections in this configuration]) +fi + +# 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) +fi |