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authorYang Tse <yangsita@gmail.com>2013-01-23 15:44:25 (GMT)
committerYang Tse <yangsita@gmail.com>2013-01-23 15:44:25 (GMT)
commit037656b2d89f7bb8fb697afff5b67c3a9b1c1d87 (patch)
tree66814cfa81c3d8ba67d7b4e5322ec5d29f7ce742
parentdc6c864108e16ad5821cadcf67d8e8faaab9443c (diff)
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configure: autotools compatibility fixes - step I
Fix proper macro expansion order across autotools versions for C compiler and preprocessor program checks.
-rw-r--r--configure.ac10
-rw-r--r--m4/cares-compilers.m418
-rw-r--r--m4/cares-confopts.m411
-rw-r--r--m4/xc-cc-check.m496
-rw-r--r--m4/xc-val-flgs.m4243
5 files changed, 351 insertions, 27 deletions
diff --git a/configure.ac b/configure.ac
index 68ec829..84aa300 100644
--- a/configure.ac
+++ b/configure.ac
@@ -69,8 +69,6 @@ if test -f ${srcdir}/ares_build.h; then
rm -f ${srcdir}/ares_build.h
fi
-AM_INIT_AUTOMAKE
-
dnl
dnl Detect the canonical host and target build environment
dnl
@@ -79,9 +77,9 @@ AC_CANONICAL_HOST
dnl Get system canonical name
AC_DEFINE_UNQUOTED(OS, "${host}", [cpu-machine-OS])
-CARES_CHECK_PROG_CC
-AM_PROG_CC_C_O
-AC_PROG_INSTALL
+XC_CHECK_PROG_CC
+
+AM_INIT_AUTOMAKE
dnl This defines _ALL_SOURCE for AIX
CARES_CHECK_AIX_ALL_SOURCE
@@ -864,5 +862,7 @@ squeeze LIBS
squeeze CARES_PRIVATE_LIBS
+XC_CHECK_BUILD_FLAGS
+
AC_CONFIG_FILES([Makefile libcares.pc])
AC_OUTPUT
diff --git a/m4/cares-compilers.m4 b/m4/cares-compilers.m4
index a716fed..4c40403 100644
--- a/m4/cares-compilers.m4
+++ b/m4/cares-compilers.m4
@@ -1,6 +1,6 @@
#***************************************************************************
#
-# Copyright (C) 2009-2012 by Daniel Stenberg et al
+# Copyright (C) 2009-2013 by Daniel Stenberg et al
#
# Permission to use, copy, modify, and distribute this software and its
# documentation for any purpose and without fee is hereby granted, provided
@@ -15,7 +15,7 @@
#***************************************************************************
# File version for 'aclocal' use. Keep it a single number.
-# serial 73
+# serial 74
dnl CARES_CHECK_COMPILER
@@ -1296,20 +1296,6 @@ AC_DEFUN([CARES_CHECK_NO_UNDEFINED], [
])
-dnl CARES_CHECK_PROG_CC
-dnl -------------------------------------------------
-dnl Check for compiler program, preventing CFLAGS and
-dnl CPPFLAGS from being unexpectedly changed.
-
-AC_DEFUN([CARES_CHECK_PROG_CC], [
- ac_save_CFLAGS="$CFLAGS"
- ac_save_CPPFLAGS="$CPPFLAGS"
- AC_PROG_CC
- CFLAGS="$ac_save_CFLAGS"
- CPPFLAGS="$ac_save_CPPFLAGS"
-])
-
-
dnl CARES_CHECK_COMPILER_HALT_ON_ERROR
dnl -------------------------------------------------
dnl Verifies if the compiler actually halts after the
diff --git a/m4/cares-confopts.m4 b/m4/cares-confopts.m4
index c2c37f6..9d12a9b 100644
--- a/m4/cares-confopts.m4
+++ b/m4/cares-confopts.m4
@@ -1,7 +1,6 @@
#***************************************************************************
-# $Id$
#
-# Copyright (C) 2008 - 2012 by Daniel Stenberg et al
+# Copyright (C) 2008 - 2013 by Daniel Stenberg et al
#
# Permission to use, copy, modify, and distribute this software and its
# documentation for any purpose and without fee is hereby granted, provided
@@ -16,7 +15,7 @@
#***************************************************************************
# File version for 'aclocal' use. Keep it a single number.
-# serial 10
+# serial 11
dnl CARES_CHECK_OPTION_CURLDEBUG
@@ -67,7 +66,7 @@ dnl variable want_debug value as appropriate.
AC_DEFUN([CARES_CHECK_OPTION_DEBUG], [
AC_BEFORE([$0],[CARES_CHECK_OPTION_WARNINGS])dnl
AC_BEFORE([$0],[CARES_CHECK_OPTION_CURLDEBUG])dnl
- AC_BEFORE([$0],[CARES_CHECK_PROG_CC])dnl
+ AC_BEFORE([$0],[XC_CHECK_PROG_CC])dnl
AC_MSG_CHECKING([whether to enable debug build options])
OPT_DEBUG_BUILD="default"
AC_ARG_ENABLE(debug,
@@ -132,7 +131,7 @@ dnl shell variable want_optimize value as appropriate.
AC_DEFUN([CARES_CHECK_OPTION_OPTIMIZE], [
AC_REQUIRE([CARES_CHECK_OPTION_DEBUG])dnl
- AC_BEFORE([$0],[CARES_CHECK_PROG_CC])dnl
+ AC_BEFORE([$0],[XC_CHECK_PROG_CC])dnl
AC_MSG_CHECKING([whether to enable compiler optimizer])
OPT_COMPILER_OPTIMIZE="default"
AC_ARG_ENABLE(optimize,
@@ -229,7 +228,7 @@ dnl shell variable want_warnings as appropriate.
AC_DEFUN([CARES_CHECK_OPTION_WARNINGS], [
AC_REQUIRE([CARES_CHECK_OPTION_DEBUG])dnl
AC_BEFORE([$0],[CARES_CHECK_OPTION_WERROR])dnl
- AC_BEFORE([$0],[CARES_CHECK_PROG_CC])dnl
+ AC_BEFORE([$0],[XC_CHECK_PROG_CC])dnl
AC_MSG_CHECKING([whether to enable strict compiler warnings])
OPT_COMPILER_WARNINGS="default"
AC_ARG_ENABLE(warnings,
diff --git a/m4/xc-cc-check.m4 b/m4/xc-cc-check.m4
new file mode 100644
index 0000000..cd55405
--- /dev/null
+++ b/m4/xc-cc-check.m4
@@ -0,0 +1,96 @@
+#---------------------------------------------------------------------------
+#
+# xc-cc-check.m4
+#
+# Copyright (c) 2013 Daniel Stenberg <daniel@haxx.se>
+#
+# Permission to use, copy, modify, and distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+#
+#---------------------------------------------------------------------------
+
+# serial 1
+
+
+dnl _XC_PROG_CC_PREAMBLE
+dnl -------------------------------------------------
+dnl Private macro.
+
+AC_DEFUN([_XC_PROG_CC_PREAMBLE], [
+ xc_prog_cc_prev_IFS=$IFS
+ xc_prog_cc_prev_LIBS=$LIBS
+ xc_prog_cc_prev_CFLAGS=$CFLAGS
+ xc_prog_cc_prev_LDFLAGS=$LDFLAGS
+ xc_prog_cc_prev_CPPFLAGS=$CPPFLAGS
+])
+
+
+dnl _XC_PROG_CC_POSTLUDE
+dnl -------------------------------------------------
+dnl Private macro.
+
+AC_DEFUN([_XC_PROG_CC_POSTLUDE], [
+ IFS=$xc_prog_cc_prev_IFS
+ LIBS=$xc_prog_cc_prev_LIBS
+ CFLAGS=$xc_prog_cc_prev_CFLAGS
+ LDFLAGS=$xc_prog_cc_prev_LDFLAGS
+ CPPFLAGS=$xc_prog_cc_prev_CPPFLAGS
+ AC_SUBST([CC])dnl
+ AC_SUBST([CPP])dnl
+ AC_SUBST([LIBS])dnl
+ AC_SUBST([CFLAGS])dnl
+ AC_SUBST([LDFLAGS])dnl
+ AC_SUBST([CPPFLAGS])dnl
+])
+
+
+dnl _XC_PROG_CC
+dnl -------------------------------------------------
+dnl Private macro.
+
+AC_DEFUN([_XC_PROG_CC], [
+ AC_REQUIRE([_XC_PROG_CC_PREAMBLE])dnl
+ AC_REQUIRE([XC_CHECK_USER_FLAGS])dnl
+ AC_REQUIRE([AC_PROG_INSTALL])dnl
+ AC_REQUIRE([AC_PROG_CC])dnl
+ AC_REQUIRE([AM_PROG_CC_C_O])dnl
+ AC_REQUIRE([AC_PROG_CPP])dnl
+ AC_REQUIRE([_XC_PROG_CC_POSTLUDE])dnl
+])
+
+
+dnl XC_CHECK_PROG_CC
+dnl -------------------------------------------------
+dnl Public macro.
+dnl
+dnl Checks for C compiler and C preprocessor programs,
+dnl while doing some previous sanity validation on user
+dnl provided LIBS, LDFLAGS, CPPFLAGS and CFLAGS values
+dnl that must succeed in order to continue execution.
+dnl
+dnl This sets variables CC and CPP, while preventing
+dnl LIBS, LDFLAGS, CFLAGS, CPPFLAGS and IFS from being
+dnl unexpectedly changed by underlying macros.
+
+AC_DEFUN([XC_CHECK_PROG_CC], [
+ AC_PREREQ([2.50])dnl
+ AC_BEFORE([$0],[_XC_PROG_CC_PREAMBLE])dnl
+ AC_BEFORE([$0],[AC_PROG_INSTALL])dnl
+ AC_BEFORE([$0],[AC_PROG_CC])dnl
+ AC_BEFORE([$0],[AM_PROG_CC_C_O])dnl
+ AC_BEFORE([$0],[AC_PROG_CPP])dnl
+ AC_BEFORE([$0],[AC_PROG_LIBTOOL])dnl
+ AC_BEFORE([$0],[AM_INIT_AUTOMAKE])dnl
+ AC_BEFORE([$0],[_XC_PROG_CC_POSTLUDE])dnl
+ AC_REQUIRE([_XC_PROG_CC])dnl
+])
+
diff --git a/m4/xc-val-flgs.m4 b/m4/xc-val-flgs.m4
new file mode 100644
index 0000000..81d1eac
--- /dev/null
+++ b/m4/xc-val-flgs.m4
@@ -0,0 +1,243 @@
+#---------------------------------------------------------------------------
+#
+# xc-val-flgs.m4
+#
+# Copyright (c) 2013 Daniel Stenberg <daniel@haxx.se>
+#
+# 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
+])
+