diff options
Diffstat (limited to 'recipes/cairo/cairo-1.2.4/0001-Add-autoconf-macro-AX_C_FLOAT_WORDS_BIGENDIAN.diff')
| -rw-r--r-- | recipes/cairo/cairo-1.2.4/0001-Add-autoconf-macro-AX_C_FLOAT_WORDS_BIGENDIAN.diff | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/recipes/cairo/cairo-1.2.4/0001-Add-autoconf-macro-AX_C_FLOAT_WORDS_BIGENDIAN.diff b/recipes/cairo/cairo-1.2.4/0001-Add-autoconf-macro-AX_C_FLOAT_WORDS_BIGENDIAN.diff new file mode 100644 index 0000000000..90718d4976 --- /dev/null +++ b/recipes/cairo/cairo-1.2.4/0001-Add-autoconf-macro-AX_C_FLOAT_WORDS_BIGENDIAN.diff @@ -0,0 +1,103 @@ +From nobody Mon Sep 17 00:00:00 2001 +From: Dan Amelang <dan@amelang.net> +Date: Sun Oct 29 21:30:08 2006 -0800 +Subject: [PATCH] Add autoconf macro AX_C_FLOAT_WORDS_BIGENDIAN + +The symbol that this macro defines (FLOAT_WORDS_BIGENDIAN) can be used +to make double arithmetic tricks portable. + +--- + + acinclude.m4 | 65 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ + configure.in | 1 + + 2 files changed, 66 insertions(+), 0 deletions(-) + +3231d91b59a6c2e1c40bbaa8b143694b6c693662 +diff --git a/acinclude.m4 b/acinclude.m4 +index af73800..a0eb13a 100644 +--- a/acinclude.m4 ++++ b/acinclude.m4 +@@ -51,3 +51,68 @@ ifelse([$1],[],, + AM_CONDITIONAL(ENABLE_GTK_DOC, test x$enable_gtk_doc = xyes) + AM_CONDITIONAL(GTK_DOC_USE_LIBTOOL, test -n "$LIBTOOL") + ]) ++ ++# AX_C_FLOAT_WORDS_BIGENDIAN ([ACTION-IF-TRUE], [ACTION-IF-FALSE], ++# [ACTION-IF-UNKNOWN]) ++# ++# Checks the ordering of words within a multi-word float. This check ++# is necessary because on some systems (e.g. certain ARM systems), the ++# float word ordering can be different from the byte ordering. In a ++# multi-word float context, "big-endian" implies that the word containing ++# the sign bit is found in the memory location with the lowest address. ++# This implemenation was inspired by the AC_C_BIGENDIAN macro in autoconf. ++# ------------------------------------------------------------------------- ++AC_DEFUN([AX_C_FLOAT_WORDS_BIGENDIAN], ++ [AC_CACHE_CHECK(whether float word ordering is bigendian, ++ ax_cv_c_float_words_bigendian, [ ++ ++# The endianess is detected by first compiling C code that contains a special ++# double float value, then grepping the resulting object file for certain ++# strings of ascii values. The double is specially crafted to have a ++# binary representation that corresponds with a simple string. In this ++# implementation, the string "noonsees" was selected because the individual ++# word values ("noon" and "sees") are palindromes, thus making this test ++# byte-order agnostic. If grep finds the string "noonsees" in the object ++# file, the target platform stores float words in big-endian order. If grep ++# finds "seesnoon", float words are in little-endian order. If neither value ++# is found, the user is instructed to specify the ordering. ++ ++ax_cv_c_float_words_bigendian=unknown ++AC_COMPILE_IFELSE([AC_LANG_SOURCE([[ ++ ++double d = 90904234967036810337470478905505011476211692735615632014797120844053488865816695273723469097858056257517020191247487429516932130503560650002327564517570778480236724525140520121371739201496540132640109977779420565776568942592.0; ++ ++]])], [ ++ ++if grep noonsees conftest.$ac_objext >/dev/null ; then ++ ax_cv_c_float_words_bigendian=yes ++fi ++if grep seesnoon conftest.$ac_objext >/dev/null ; then ++ if test "$ax_cv_c_float_words_bigendian" = unknown; then ++ ax_cv_c_float_words_bigendian=no ++ else ++ ax_cv_c_float_words_bigendian=unknown ++ fi ++fi ++ ++])]) ++ ++case $ax_cv_c_float_words_bigendian in ++ yes) ++ m4_default([$1], ++ [AC_DEFINE([FLOAT_WORDS_BIGENDIAN], 1, ++ [Define to 1 if your system stores words within floats ++ with the most significant word first])]) ;; ++ no) ++ $2 ;; ++ *) ++ m4_default([$3], ++ [AC_MSG_ERROR([ ++ ++Unknown float word ordering. You need to manually preset ++ax_cv_c_float_words_bigendian=no (or yes) according to your system. ++ ++ ])]) ;; ++esac ++ ++])# AX_C_FLOAT_WORDS_BIGENDIAN +diff --git a/configure.in b/configure.in +index 2d2bf9f..797c7ce 100644 +--- a/configure.in ++++ b/configure.in +@@ -55,6 +55,7 @@ AC_PROG_CPP + AC_PROG_LIBTOOL dnl required version (1.4) DON'T REMOVE! + AC_STDC_HEADERS + AC_C_BIGENDIAN ++AX_C_FLOAT_WORDS_BIGENDIAN + + dnl =========================================================================== + dnl === Local macros +-- +1.2.6 + |