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112 lines
3.1 KiB
Plaintext
112 lines
3.1 KiB
Plaintext
GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
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# Local configure fragment for sysdeps/x86_64.
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AC_CHECK_HEADER([cpuid.h], ,
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[AC_MSG_ERROR([gcc must provide the <cpuid.h> header])],
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[/* No default includes. */])
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AC_CACHE_CHECK(if -g produces usable source locations for assembler-with-cpp,
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libc_cv_cpp_asm_debuginfo, [dnl
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cat > conftest.S <<EOF
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#include "confdefs.h"
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/* comment on
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two lines */
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${libc_cv_dot_text}
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${libc_cv_asm_global_directive} foo
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foo:
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/* Unfortunately this test only works for a real instruction,
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not for any of the machine-independent pseudo-ops.
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So we just have to assume everybody has a "nop". */
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nop
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/* comment */
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nop
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/* comment */
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nop
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EOF
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if AC_TRY_COMMAND([${CC-cc} $CPPFLAGS $ASFLAGS -g -c conftest.S 1>&AS_MESSAGE_LOG_FD]) && {
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ac_pattern='conftest\.S'
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AC_TRY_COMMAND([readelf --debug-dump=line conftest.o |
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grep $ac_pattern 1>&AS_MESSAGE_LOG_FD])
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}; then
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libc_cv_cpp_asm_debuginfo=yes
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else
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libc_cv_cpp_asm_debuginfo=no
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fi
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rm -f conftest*])AC_SUBST(libc_cv_cpp_asm_debuginfo)
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if test $libc_cv_cpp_asm_debuginfo = yes; then
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AC_DEFINE(HAVE_CPP_ASM_DEBUGINFO)
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fi
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dnl Check if -msse4 works.
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AC_CACHE_CHECK(for SSE4 support, libc_cv_cc_sse4, [dnl
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LIBC_TRY_CC_OPTION([-msse4], [libc_cv_cc_sse4=yes], [libc_cv_cc_sse4=no])
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])
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if test $libc_cv_cc_sse4 = yes; then
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AC_DEFINE(HAVE_SSE4_SUPPORT)
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fi
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dnl Check if -mavx works.
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AC_CACHE_CHECK(for AVX support, libc_cv_cc_avx, [dnl
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LIBC_TRY_CC_OPTION([-mavx], [libc_cv_cc_avx=yes], [libc_cv_cc_avx=no])
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])
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if test $libc_cv_cc_avx = yes; then
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AC_DEFINE(HAVE_AVX_SUPPORT)
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fi
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dnl Check if -msse2avx works.
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AC_CACHE_CHECK(for AVX encoding of SSE instructions, libc_cv_cc_sse2avx, [dnl
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LIBC_TRY_CC_OPTION([-msse2avx],
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[libc_cv_cc_sse2avx=yes],
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[libc_cv_cc_sse2avx=no])
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])
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if test $libc_cv_cc_sse2avx = yes; then
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AC_DEFINE(HAVE_SSE2AVX_SUPPORT)
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fi
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dnl Check if -mfma4 works.
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AC_CACHE_CHECK(for FMA4 support, libc_cv_cc_fma4, [dnl
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LIBC_TRY_CC_OPTION([-mfma4], [libc_cv_cc_fma4=yes], [libc_cv_cc_fma4=no])
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])
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if test $libc_cv_cc_fma4 = yes; then
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AC_DEFINE(HAVE_FMA4_SUPPORT)
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fi
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dnl Check if -mno-vzeroupper works.
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AC_CACHE_CHECK(for -mno-vzeroupper support, libc_cv_cc_novzeroupper, [dnl
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LIBC_TRY_CC_OPTION([-mno-vzeroupper],
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[libc_cv_cc_novzeroupper=yes],
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[libc_cv_cc_novzeroupper=no])
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])
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# Check for support of thread-local storage handling in assembler and linker.
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AC_CACHE_CHECK(for x86-64 TLS support, libc_cv_x86_64_tls, [dnl
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cat > conftest.s <<\EOF
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.section ".tdata", "awT", @progbits
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.globl foo
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foo: .quad 1
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.section ".tbss", "awT", @nobits
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.globl bar
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bar: .skip 8
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.text
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baz: leaq bar@TLSLD(%rip), %rdi
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leaq bar@DTPOFF(%rax), %rcx
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addq foo@GOTTPOFF(%rip), %rax
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movq $bar@TPOFF, %rdx
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EOF
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dnl
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if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
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libc_cv_x86_64_tls=yes
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else
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libc_cv_x86_64_tls=no
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fi
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rm -f conftest*])
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if test $libc_cv_x86_64_tls = no; then
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AC_MSG_ERROR([the assembler must support TLS])
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fi
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dnl It is always possible to access static and hidden symbols in an
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dnl position independent way.
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AC_DEFINE(PI_STATIC_AND_HIDDEN)
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# work around problem with autoconf and empty lines at the end of files
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