mirror of
https://gitlab.freedesktop.org/cairo/cairo.git
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26b06516a7
This is needed to fix the AX_C_FLOAT_WORDS_BIGENDIAN macro on Mac OS X 10.2,
which was brought up here:
https://bugs.freedesktop.org/show_bug.cgi?id=9124
118 lines
4.1 KiB
Text
118 lines
4.1 KiB
Text
dnl -*- mode: autoconf -*-
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# serial 1
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dnl Usage:
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dnl GTK_DOC_CHECK([minimum-gtk-doc-version])
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AC_DEFUN([GTK_DOC_CHECK],
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[
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AC_BEFORE([AC_PROG_LIBTOOL],[$0])dnl setup libtool first
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AC_BEFORE([AM_PROG_LIBTOOL],[$0])dnl setup libtool first
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dnl for overriding the documentation installation directory
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AC_ARG_WITH(html-dir,
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AC_HELP_STRING([--with-html-dir=PATH], [path to installed docs]),,
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[with_html_dir='${datadir}/gtk-doc/html'])
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HTML_DIR="$with_html_dir"
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AC_SUBST(HTML_DIR)
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dnl enable/disable documentation building
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AC_ARG_ENABLE(gtk-doc,
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AC_HELP_STRING([--enable-gtk-doc],
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[use gtk-doc to build documentation [default=no]]),,
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enable_gtk_doc=no)
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have_gtk_doc=no
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if test x$enable_gtk_doc = xyes; then
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if test -z "$PKG_CONFIG"; then
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AC_PATH_PROG(PKG_CONFIG, pkg-config, no)
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fi
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if test "$PKG_CONFIG" != "no" && $PKG_CONFIG --exists gtk-doc; then
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have_gtk_doc=yes
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fi
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dnl do we want to do a version check?
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ifelse([$1],[],,
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[gtk_doc_min_version=$1
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if test "$have_gtk_doc" = yes; then
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AC_MSG_CHECKING([gtk-doc version >= $gtk_doc_min_version])
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if $PKG_CONFIG --atleast-version $gtk_doc_min_version gtk-doc; then
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AC_MSG_RESULT(yes)
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else
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AC_MSG_RESULT(no)
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have_gtk_doc=no
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fi
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fi
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])
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if test "$have_gtk_doc" != yes; then
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enable_gtk_doc=no
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fi
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fi
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AM_CONDITIONAL(ENABLE_GTK_DOC, test x$enable_gtk_doc = xyes)
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AM_CONDITIONAL(GTK_DOC_USE_LIBTOOL, test -n "$LIBTOOL")
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])
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# AX_C_FLOAT_WORDS_BIGENDIAN ([ACTION-IF-TRUE], [ACTION-IF-FALSE],
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# [ACTION-IF-UNKNOWN])
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#
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# Checks the ordering of words within a multi-word float. This check
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# is necessary because on some systems (e.g. certain ARM systems), the
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# float word ordering can be different from the byte ordering. In a
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# multi-word float context, "big-endian" implies that the word containing
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# the sign bit is found in the memory location with the lowest address.
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# This implemenation was inspired by the AC_C_BIGENDIAN macro in autoconf.
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# -------------------------------------------------------------------------
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AC_DEFUN([AX_C_FLOAT_WORDS_BIGENDIAN],
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[AC_CACHE_CHECK(whether float word ordering is bigendian,
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ax_cv_c_float_words_bigendian, [
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# The endianess is detected by first compiling C code that contains a special
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# double float value, then grepping the resulting object file for certain
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# strings of ascii values. The double is specially crafted to have a
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# binary representation that corresponds with a simple string. In this
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# implementation, the string "noonsees" was selected because the individual
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# word values ("noon" and "sees") are palindromes, thus making this test
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# byte-order agnostic. If grep finds the string "noonsees" in the object
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# file, the target platform stores float words in big-endian order. If grep
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# finds "seesnoon", float words are in little-endian order. If neither value
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# is found, the user is instructed to specify the ordering.
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ax_cv_c_float_words_bigendian=unknown
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AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
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double d = 90904234967036810337470478905505011476211692735615632014797120844053488865816695273723469097858056257517020191247487429516932130503560650002327564517570778480236724525140520121371739201496540132640109977779420565776568942592.0;
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]])], [
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if strings - conftest.$ac_objext | grep noonsees >/dev/null ; then
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ax_cv_c_float_words_bigendian=yes
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fi
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if strings - conftest.$ac_objext | grep seesnoon >/dev/null ; then
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if test "$ax_cv_c_float_words_bigendian" = unknown; then
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ax_cv_c_float_words_bigendian=no
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else
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ax_cv_c_float_words_bigendian=unknown
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fi
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fi
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])])
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case $ax_cv_c_float_words_bigendian in
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yes)
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m4_default([$1],
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[AC_DEFINE([FLOAT_WORDS_BIGENDIAN], 1,
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[Define to 1 if your system stores words within floats
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with the most significant word first])]) ;;
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no)
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$2 ;;
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*)
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m4_default([$3],
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[AC_MSG_ERROR([
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Unknown float word ordering. You need to manually preset
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ax_cv_c_float_words_bigendian=no (or yes) according to your system.
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])]) ;;
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esac
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])# AX_C_FLOAT_WORDS_BIGENDIAN
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