From 9d1effad0524bcb4763e06659b728ba134464608 Mon Sep 17 00:00:00 2001 From: Yang Tse Date: Sun, 20 Jan 2013 20:23:20 +0100 Subject: configure: autotools compatibility fixes - step I Fix proper macro expansion order across autotools versions for C compiler and preprocessor program checks. --- m4/xc-val-flgs.m4 | 243 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 243 insertions(+) create mode 100644 m4/xc-val-flgs.m4 (limited to 'm4/xc-val-flgs.m4') diff --git a/m4/xc-val-flgs.m4 b/m4/xc-val-flgs.m4 new file mode 100644 index 000000000..81d1eac9e --- /dev/null +++ b/m4/xc-val-flgs.m4 @@ -0,0 +1,243 @@ +#--------------------------------------------------------------------------- +# +# xc-val-flgs.m4 +# +# Copyright (c) 2013 Daniel Stenberg +# +# Permission to use, copy, modify, and distribute this software for any +# purpose with or without fee is hereby granted, provided that the above +# copyright notice and this permission notice appear in all copies. +# +# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES +# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF +# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR +# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES +# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN +# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF +# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. +# +#--------------------------------------------------------------------------- + +# serial 1 + + +dnl _XC_CHECK_VAR_LIBS +dnl ------------------------------------------------- +dnl Private macro. + +AC_DEFUN([_XC_CHECK_VAR_LIBS], [ + xc_bad_var_libs=no + for xc_word in $LIBS; do + case "$xc_word" in + -l* | --library=*) + : + ;; + *) + xc_bad_var_libs=yes + ;; + esac + done + if test $xc_bad_var_libs = yes; then + AC_MSG_NOTICE([using LIBS: $LIBS]) + AC_MSG_NOTICE([LIBS error: LIBS may only be used to specify libraries (-lname).]) + fi +]) + + +dnl _XC_CHECK_VAR_LDFLAGS +dnl ------------------------------------------------- +dnl Private macro. + +AC_DEFUN([_XC_CHECK_VAR_LDFLAGS], [ + xc_bad_var_ldflags=no + for xc_word in $LDFLAGS; do + case "$xc_word" in + -D*) + xc_bad_var_ldflags=yes + ;; + -U*) + xc_bad_var_ldflags=yes + ;; + -I*) + xc_bad_var_ldflags=yes + ;; + -l* | --library=*) + xc_bad_var_ldflags=yes + ;; + esac + done + if test $xc_bad_var_ldflags = yes; then + AC_MSG_NOTICE([using LDFLAGS: $LDFLAGS]) + xc_bad_var_msg="LDFLAGS error: LDFLAGS may only be used to specify linker flags, not" + for xc_word in $LDFLAGS; do + case "$xc_word" in + -D*) + AC_MSG_NOTICE([$xc_bad_var_msg macro definitions. Use CPPFLAGS for: $xc_word]) + ;; + -U*) + AC_MSG_NOTICE([$xc_bad_var_msg macro suppressions. Use CPPFLAGS for: $xc_word]) + ;; + -I*) + AC_MSG_NOTICE([$xc_bad_var_msg include directories. Use CPPFLAGS for: $xc_word]) + ;; + -l* | --library=*) + AC_MSG_NOTICE([$xc_bad_var_msg libraries. Use LIBS for: $xc_word]) + ;; + esac + done + fi +]) + + +dnl _XC_CHECK_VAR_CPPFLAGS +dnl ------------------------------------------------- +dnl Private macro. + +AC_DEFUN([_XC_CHECK_VAR_CPPFLAGS], [ + xc_bad_var_cppflags=no + for xc_word in $CPPFLAGS; do + case "$xc_word" in + -rpath*) + xc_bad_var_cppflags=yes + ;; + -L* | --library-path=*) + xc_bad_var_cppflags=yes + ;; + -l* | --library=*) + xc_bad_var_cppflags=yes + ;; + esac + done + if test $xc_bad_var_cppflags = yes; then + AC_MSG_NOTICE([using CPPFLAGS: $CPPFLAGS]) + xc_bad_var_msg="CPPFLAGS error: CPPFLAGS may only be used to specify C preprocessor flags, not" + for xc_word in $CPPFLAGS; do + case "$xc_word" in + -rpath*) + AC_MSG_NOTICE([$xc_bad_var_msg library runtime directories. Use LDFLAGS for: $xc_word]) + ;; + -L* | --library-path=*) + AC_MSG_NOTICE([$xc_bad_var_msg library directories. Use LDFLAGS for: $xc_word]) + ;; + -l* | --library=*) + AC_MSG_NOTICE([$xc_bad_var_msg libraries. Use LIBS for: $xc_word]) + ;; + esac + done + fi +]) + + +dnl _XC_CHECK_VAR_CFLAGS +dnl ------------------------------------------------- +dnl Private macro. + +AC_DEFUN([_XC_CHECK_VAR_CFLAGS], [ + xc_bad_var_cflags=no + for xc_word in $CFLAGS; do + case "$xc_word" in + -D*) + xc_bad_var_cflags=yes + ;; + -U*) + xc_bad_var_cflags=yes + ;; + -I*) + xc_bad_var_cflags=yes + ;; + -rpath*) + xc_bad_var_cflags=yes + ;; + -L* | --library-path=*) + xc_bad_var_cflags=yes + ;; + -l* | --library=*) + xc_bad_var_cflags=yes + ;; + esac + done + if test $xc_bad_var_cflags = yes; then + AC_MSG_NOTICE([using CFLAGS: $CFLAGS]) + xc_bad_var_msg="CFLAGS error: CFLAGS may only be used to specify C compiler flags, not" + for xc_word in $CFLAGS; do + case "$xc_word" in + -D*) + AC_MSG_NOTICE([$xc_bad_var_msg macro definitions. Use CPPFLAGS for: $xc_word]) + ;; + -U*) + AC_MSG_NOTICE([$xc_bad_var_msg macro suppressions. Use CPPFLAGS for: $xc_word]) + ;; + -I*) + AC_MSG_NOTICE([$xc_bad_var_msg include directories. Use CPPFLAGS for: $xc_word]) + ;; + -rpath*) + AC_MSG_NOTICE([$xc_bad_var_msg library runtime directories. Use LDFLAGS for: $xc_word]) + ;; + -L* | --library-path=*) + AC_MSG_NOTICE([$xc_bad_var_msg library directories. Use LDFLAGS for: $xc_word]) + ;; + -l* | --library=*) + AC_MSG_NOTICE([$xc_bad_var_msg libraries. Use LIBS for: $xc_word]) + ;; + esac + done + fi +]) + + +dnl XC_CHECK_USER_FLAGS +dnl ------------------------------------------------- +dnl Public macro. +dnl +dnl Performs some sanity checks for LIBS, LDFLAGS, +dnl CPPFLAGS and CFLAGS values that the user might +dnl have set. When checks fails, user is noticed +dnl about errors detected in all of them and script +dnl execution is halted. +dnl +dnl Intended to be used early in configure script. + +AC_DEFUN([XC_CHECK_USER_FLAGS], [ + AC_PREREQ([2.50])dnl + AC_BEFORE([$0],[XC_CHECK_PROG_CC])dnl + dnl check order below matters + _XC_CHECK_VAR_LIBS + _XC_CHECK_VAR_LDFLAGS + _XC_CHECK_VAR_CPPFLAGS + _XC_CHECK_VAR_CFLAGS + if test $xc_bad_var_libs = yes || + test $xc_bad_var_cflags = yes || + test $xc_bad_var_ldflags = yes || + test $xc_bad_var_cppflags = yes; then + AC_MSG_ERROR([Can not continue. Fix errors mentioned immediately above this line.]) + fi +]) + + +dnl XC_CHECK_BUILD_FLAGS +dnl ------------------------------------------------- +dnl Public macro. +dnl +dnl Performs some sanity checks for LIBS, LDFLAGS, +dnl CPPFLAGS and CFLAGS values that the configure +dnl script might have set. When checks fails, user +dnl is noticed about errors detected in all of them +dnl but script continues execution. +dnl +dnl Intended to be used very late in configure script. + +AC_DEFUN([XC_CHECK_BUILD_FLAGS], [ + AC_PREREQ([2.50])dnl + dnl check order below matters + _XC_CHECK_VAR_LIBS + _XC_CHECK_VAR_LDFLAGS + _XC_CHECK_VAR_CPPFLAGS + _XC_CHECK_VAR_CFLAGS + if test $xc_bad_var_libs = yes || + test $xc_bad_var_cflags = yes || + test $xc_bad_var_ldflags = yes || + test $xc_bad_var_cppflags = yes; then + AC_MSG_WARN([Continuing even with errors mentioned immediately above this line.]) + fi +]) + -- cgit v1.2.3