mirror of
https://gitlab.freedesktop.org/cairo/cairo.git
synced 2026-05-05 05:18:01 +02:00
195fd27cc6
Richard Hult reported that -Wl,--allow-shlib-undefined was incorrectly being identified as supported by gcc under Mac OS/X: configure:25103: checking whether gcc supports -Wl,--allow-shlib-undefined configure:25117: gcc -c -Werror -Wl,--allow-shlib-undefined conftest.c >&5 i686-apple-darwin9-gcc-4.0.1: --allow-shlib-undefined: linker input file unused because linking not done So instead of just checking whether the compiler accepts the flag, check that we can actually link a dummy file.
156 lines
3.9 KiB
Text
156 lines
3.9 KiB
Text
dnl ==========================================================================
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dnl
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dnl Cairo-specific macros
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dnl
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dnl ==========================================================================
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dnl Usage:
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dnl CAIRO_BIGENDIAN
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dnl
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AC_DEFUN([CAIRO_BIGENDIAN],
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[dnl
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case $host_os in
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darwin*)
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AH_VERBATIM([X_BYTE_ORDER],
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[
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/* Deal with multiple architecture compiles on Mac OS X */
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#ifdef __APPLE_CC__
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#ifdef __BIG_ENDIAN__
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#define WORDS_BIGENDIAN 1
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#define FLOAT_WORDS_BIGENDIAN 1
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#else
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#undef WORDS_BIGENDIAN
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#undef FLOAT_WORDS_BIGENDIAN
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#endif
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#endif
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])
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;;
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*)
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AC_C_BIGENDIAN
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AX_C_FLOAT_WORDS_BIGENDIAN
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;;
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esac
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])
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dnl CAIRO_CHECK_FUNCS_WITH_FLAGS(FUNCTION..., CFLAGS, LIBS
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dnl [, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
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dnl Like AC_CHECK_FUNCS but with additional CFLAGS and LIBS
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dnl --------------------------------------------------------------------
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AC_DEFUN([CAIRO_CHECK_FUNCS_WITH_FLAGS],
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[dnl
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_save_cflags="$CFLAGS"
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_save_libs="$LIBS"
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CFLAGS="$CFLAGS $2"
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LIBS="$LIBS $3"
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AC_CHECK_FUNCS($1, $4, $5)
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CFLAGS="$_save_cflags"
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LIBS="$_save_libs"
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])
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dnl CAIRO_CONFIG_COMMANDS is like AC_CONFIG_COMMANDS, except that:
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dnl
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dnl 1) It redirects the stdout of the command to the file.
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dnl 2) It does not recreate the file if contents didn't change.
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dnl
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AC_DEFUN([CAIRO_CONFIG_COMMANDS],
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[dnl
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AC_CONFIG_COMMANDS($1,
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[
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_config_file=$1
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_tmp_file=cairoconf.tmp
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AC_MSG_NOTICE([creating $_config_file])
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{
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$2
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} >> "$_tmp_file" ||
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AC_MSG_ERROR([failed to write to $_tmp_file])
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if cmp -s "$_tmp_file" "$_config_file"; then
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AC_MSG_NOTICE([$_config_file is unchanged])
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rm -f "$_tmp_file"
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else
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mv "$_tmp_file" "$_config_file" ||
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AC_MSG_ERROR([failed to update $_config_file])
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fi
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], $3)
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])
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dnl check compiler flags
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AC_DEFUN([CAIRO_CC_TRY_FLAG],
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[dnl
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AC_MSG_CHECKING([whether $CC supports $1])
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_save_cflags="$CFLAGS"
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CFLAGS="$CFLAGS -Werror $1"
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AC_COMPILE_IFELSE([ ], [cairo_cc_flag=yes], [cairo_cc_flag=no])
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CFLAGS="$_save_cflags"
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if test "x$cairo_cc_flag" = "xyes"; then
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ifelse([$2], , :, [$2])
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else
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ifelse([$3], , :, [$3])
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fi
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AC_MSG_RESULT([$cairo_cc_flag])
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])
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dnl check compiler/ld flags
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AC_DEFUN([CAIRO_CC_TRY_LINK_FLAG],
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[dnl
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AC_MSG_CHECKING([whether $CC supports $1])
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_save_cflags="$CFLAGS"
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CFLAGS="$CFLAGS -Werror $1"
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AC_LINK_IFELSE([int main(void){ return 0;} ],
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[cairo_cc_flag=yes],
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[cairo_cc_flag=no])
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CFLAGS="$_save_cflags"
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if test "x$cairo_cc_flag" = "xyes"; then
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ifelse([$2], , :, [$2])
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else
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ifelse([$3], , :, [$3])
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fi
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AC_MSG_RESULT([$cairo_cc_flag])
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])
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dnl Usage:
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dnl CAIRO_CHECK_NATIVE_ATOMIC_PRIMITIVES
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AC_DEFUN([CAIRO_CHECK_NATIVE_ATOMIC_PRIMITIVES],
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[dnl
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AC_CACHE_CHECK([for native atomic primitives], cairo_cv_atomic_primitives,
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[
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cairo_cv_atomic_primitives="none"
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AC_TRY_LINK([
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int atomic_add(int i) { return __sync_fetch_and_add (&i, 1); }
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int atomic_cmpxchg(int i, int j, int k) { return __sync_val_compare_and_swap (&i, j, k); }
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], [],
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cairo_cv_atomic_primitives="Intel"
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)
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])
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if test "x$cairo_cv_atomic_primitives" = xIntel; then
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AC_DEFINE(HAVE_INTEL_ATOMIC_PRIMITIVES, 1,
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[Enable if your compiler supports the Intel __sync_* atomic primitives])
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fi
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])
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dnl Usage:
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dnl CAIRO_CHECK_ATOMIC_OP_NEEDS_MEMORY_BARRIER
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AC_DEFUN([CAIRO_CHECK_ATOMIC_OP_NEEDS_MEMORY_BARRIER],
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[dnl
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AC_CACHE_CHECK([whether atomic ops require a memory barrier], cairo_cv_atomic_op_needs_memory_barrier,
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[
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case $host_cpu in
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i?86) cairo_cv_atomic_op_needs_memory_barrier="no" ;;
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x86_64) cairo_cv_atomic_op_needs_memory_barrier="no" ;;
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arm*) cairo_cv_atomic_op_needs_memory_barrier="no" ;;
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*) cairo_cv_atomic_op_needs_memory_barrier="yes" ;;
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esac
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])
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if test "x$cairo_cv_atomic_op_needs_memory_barrier" = "xyes"; then
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AC_DEFINE_UNQUOTED(ATOMIC_OP_NEEDS_MEMORY_BARRIER, 1,
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[whether memory barriers are needed around atomic operations])
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fi
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])
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AC_DEFUN([CAIRO_TEXT_WRAP], [m4_text_wrap([$1], [$2],, 78)])
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