Commit 9d1effad authored by Yang Tse's avatar Yang Tse
Browse files

configure: autotools compatibility fixes - step I 

Fix proper macro expansion order across autotools versions for
C compiler and preprocessor program checks.
parent e5ea45ec

configure.ac

+3 −209
Original line number Diff line number Diff line
@@ -5,7 +5,7 @@ 
#                            | (__| |_| |  _ <| |___

#                             \___|\___/|_| \_\_____|

#

# Copyright (C) 1998 - 2012, Daniel Stenberg, <daniel@haxx.se>, et al.

# Copyright (C) 1998 - 2013, Daniel Stenberg, <daniel@haxx.se>, et al.

#

# This software is licensed as described in the file COPYING, which

# you should have received as part of this distribution. The terms
@@ -125,6 +125,7 @@ fi 


dnl figure out the libcurl version

CURLVERSION=`$SED -ne 's/^#define LIBCURL_VERSION "\(.*\)"/\1/p' ${srcdir}/include/curl/curlver.h`

XC_CHECK_PROG_CC

AM_INIT_AUTOMAKE

AC_MSG_CHECKING([curl version])

AC_MSG_RESULT($CURLVERSION)
@@ -168,119 +169,6 @@ curl_verbose_msg="enabled (--disable-verbose)" 


    init_ssl_msg=${curl_ssl_msg}



dnl

dnl LIBS should only specify libraries

dnl

tst_bad_spec="no"

for word1 in $LIBS; do

  case "$word1" in

    -l* | --library=*)

      :

      ;;

    *)

      tst_bad_spec="yes"

      ;;

  esac

done

if test "$tst_bad_spec" = "yes"; then

  AC_MSG_WARN([invalid LIBS: $LIBS])

  AC_MSG_ERROR([LIBS may only be used to specify libraries (-lname).])

fi



dnl

dnl LDFLAGS should only specify linker flags

dnl

tst_bad_msg=""

tst_bad_spec="no"

for word1 in $LDFLAGS; do

  case "$word1" in

    -D*)

      tst_bad_spec="yes"

      tst_bad_msg="not macro definitions. Use CPPFLAGS for these."

      ;;

    -U*)

      tst_bad_spec="yes"

      tst_bad_msg="not macro suppressions. Use CPPFLAGS for these."

      ;;

    -I*)

      tst_bad_spec="yes"

      tst_bad_msg="not include directories. Use CPPFLAGS for these."

      ;;

    -l* | --library=*)

      tst_bad_spec="yes"

      tst_bad_msg="not libraries. Use LIBS for these."

      ;;

  esac

done

if test "$tst_bad_spec" = "yes"; then

  AC_MSG_WARN([invalid LDFLAGS: $LDFLAGS])

  AC_MSG_ERROR([LDFLAGS may only be used to specify linker flags, $tst_bad_msg])

fi



dnl

dnl CPPFLAGS should only specify C preprocessor flags

dnl

tst_bad_msg=""

tst_bad_spec="no"

for word1 in $CPPFLAGS; do

  case "$word1" in

    -rpath*)

      tst_bad_spec="yes"

      tst_bad_msg="not library runtime directories. Use LDFLAGS for these."

      ;;

    -L* | --library-path=*)

      tst_bad_spec="yes"

      tst_bad_msg="not library directories. Use LDFLAGS for these."

      ;;

    -l* | --library=*)

      tst_bad_spec="yes"

      tst_bad_msg="not libraries. Use LIBS for these."

      ;;

  esac

done

if test "$tst_bad_spec" = "yes"; then

  AC_MSG_WARN([invalid CPPFLAGS: $CPPFLAGS])

  AC_MSG_ERROR([CPPFLAGS may only be used to specify C preprocessor flags, $tst_bad_msg])

fi



dnl

dnl CFLAGS should only specify C compiler flags

dnl

tst_bad_msg=""

tst_bad_spec="no"

for word1 in $CFLAGS; do

  case "$word1" in

    -D*)

      tst_bad_spec="yes"

      tst_bad_msg="not macro definitions. Use CPPFLAGS for these."

      ;;

    -U*)

      tst_bad_spec="yes"

      tst_bad_msg="not macro suppressions. Use CPPFLAGS for these."

      ;;

    -I*)

      tst_bad_spec="yes"

      tst_bad_msg="not include directories. Use CPPFLAGS for these."

      ;;

    -rpath*)

      tst_bad_spec="yes"

      tst_bad_msg="not library runtime directories. Use LDFLAGS for these."

      ;;

    -L* | --library-path=*)

      tst_bad_spec="yes"

      tst_bad_msg="not library directories. Use LDFLAGS for these."

      ;;

    -l* | --library=*)

      tst_bad_spec="yes"

      tst_bad_msg="not libraries. Use LIBS for these."

      ;;

  esac

done

if test "$tst_bad_spec" = "yes"; then

  AC_MSG_WARN([invalid CFLAGS: $CFLAGS])

  AC_MSG_ERROR([CFLAGS may only be used to specify C compiler flags, $tst_bad_msg])

fi



dnl

dnl Save some initial values the user might have provided

dnl
@@ -296,7 +184,6 @@ dnl Get system canonical name 
AC_DEFINE_UNQUOTED(OS, "${host}", [cpu-machine-OS])



dnl Checks for programs.

CURL_CHECK_PROG_CC



dnl Our curl_off_t internal and external configure settings

CURL_CONFIGURE_CURL_OFF_T
@@ -3615,100 +3502,7 @@ squeeze CURL_NETWORK_AND_TIME_LIBS 
squeeze SUPPORT_FEATURES

squeeze SUPPORT_PROTOCOLS



dnl

dnl Some sanity checks for LIBS, LDFLAGS, CPPFLAGS and CFLAGS values that

dnl configure is going to feed into makefiles generated by automake. Due

dnl to automake placement and usage of these variables we have to follow

dnl its rules or we may get funny results later on at make-time.

dnl



dnl

dnl LIBS should only specify libraries

dnl

AC_MSG_NOTICE([using LIBS: $LIBS])

tst_bad_spec="no"

for word1 in $LIBS; do

  case "$word1" in

    -l* | --library=*)

      :

      ;;

    *)

      tst_bad_spec="yes"

      ;;

  esac

done

if test "$tst_bad_spec" = "yes"; then

  AC_MSG_WARN([oops, LIBS should only specify libraries.])

fi



dnl

dnl LDFLAGS should only specify linker flags

dnl

AC_MSG_NOTICE([using LDFLAGS: $LDFLAGS])

tst_bad_msg="oops, LDFLAGS should only specify linker flags, not"

for word1 in $LDFLAGS; do

  case "$word1" in

    -D*)

      AC_MSG_WARN([$tst_bad_msg macro definitions. Use CPPFLAGS for: $word1])

      ;;

    -U*)

      AC_MSG_WARN([$tst_bad_msg macro suppressions. Use CPPFLAGS for: $word1])

      ;;

    -I*)

      AC_MSG_WARN([$tst_bad_msg include directories. Use CPPFLAGS for: $word1])

      ;;

    -l* | --library=*)

      AC_MSG_WARN([$tst_bad_msg libraries. Use LIBS for: $word1])

      ;;

  esac

done



dnl

dnl CPPFLAGS should only specify C preprocessor flags

dnl

AC_MSG_NOTICE([using CPPFLAGS: $CPPFLAGS])

tst_bad_msg="oops, CPPFLAGS should only specify C preprocessor flags, not"

for word1 in $CPPFLAGS; do

  case "$word1" in

    -rpath*)

      AC_MSG_WARN([$tst_bad_msg library runtime directories. Use LDFLAGS for: $word1])

      ;;

    -L* | --library-path=*)

      AC_MSG_WARN([$tst_bad_msg library directories. Use LDFLAGS for: $word1])

      ;;

    -l* | --library=*)

      AC_MSG_WARN([$tst_bad_msg libraries. Use LIBS for: $word1])

      ;;

  esac

done



dnl

dnl CFLAGS should only specify C compiler flags

dnl

AC_MSG_NOTICE([using CFLAGS: $CFLAGS])

tst_bad_msg="oops, CFLAGS should only specify C compiler flags, not"

for word1 in $CFLAGS; do

  case "$word1" in

    -D*)

      AC_MSG_WARN([$tst_bad_msg macro definitions. Use CPPFLAGS for: $word1])

      ;;

    -U*)

      AC_MSG_WARN([$tst_bad_msg macro suppressions. Use CPPFLAGS for: $word1])

      ;;

    -I*)

      AC_MSG_WARN([$tst_bad_msg include directories. Use CPPFLAGS for: $word1])

      ;;

    -rpath*)

      AC_MSG_WARN([$tst_bad_msg library runtime directories. Use LDFLAGS for: $word1])

      ;;

    -L* | --library-path=*)

      AC_MSG_WARN([$tst_bad_msg library directories. Use LDFLAGS for: $word1])

      ;;

    -l* | --library=*)

      AC_MSG_WARN([$tst_bad_msg libraries. Use LIBS for: $word1])

      ;;

  esac

done

XC_CHECK_BUILD_FLAGS



if test "x$want_curldebug_assumed" = "xyes" &&

  test "x$want_curldebug" = "xyes" && test "x$USE_ARES" = "x1"; then

m4/curl-compilers.m4

+2 −16
Original line number Diff line number Diff line
@@ -5,7 +5,7 @@ 
#                            | (__| |_| |  _ <| |___

#                             \___|\___/|_| \_\_____|

#

# Copyright (C) 1998 - 2012, Daniel Stenberg, <daniel@haxx.se>, et al.

# Copyright (C) 1998 - 2013, Daniel Stenberg, <daniel@haxx.se>, et al.

#

# This software is licensed as described in the file COPYING, which

# you should have received as part of this distribution. The terms
@@ -21,7 +21,7 @@ 
#***************************************************************************



# File version for 'aclocal' use. Keep it a single number.

# serial 64

# serial 65





dnl CURL_CHECK_COMPILER
@@ -1264,20 +1264,6 @@ AC_DEFUN([CURL_CHECK_NO_UNDEFINED], [ 
])





dnl CURL_CHECK_PROG_CC

dnl -------------------------------------------------

dnl Check for compiler program, preventing CFLAGS and

dnl CPPFLAGS from being unexpectedly changed.



AC_DEFUN([CURL_CHECK_PROG_CC], [

  ac_save_CFLAGS="$CFLAGS"

  ac_save_CPPFLAGS="$CPPFLAGS"

  AC_PROG_CC

  CFLAGS="$ac_save_CFLAGS"

  CPPFLAGS="$ac_save_CPPFLAGS"

])





dnl CURL_CHECK_COMPILER_HALT_ON_ERROR

dnl -------------------------------------------------

dnl Verifies if the compiler actually halts after the

m4/curl-confopts.m4

+5 −5
Original line number Diff line number Diff line
@@ -5,7 +5,7 @@ 
#                            | (__| |_| |  _ <| |___

#                             \___|\___/|_| \_\_____|

#

# Copyright (C) 1998 - 2012, Daniel Stenberg, <daniel@haxx.se>, et al.

# Copyright (C) 1998 - 2013, Daniel Stenberg, <daniel@haxx.se>, et al.

#

# This software is licensed as described in the file COPYING, which

# you should have received as part of this distribution. The terms
@@ -21,7 +21,7 @@ 
#***************************************************************************



# File version for 'aclocal' use. Keep it a single number.

# serial 18

# serial 19



dnl CURL_CHECK_OPTION_THREADED_RESOLVER

dnl -------------------------------------------------
@@ -145,7 +145,7 @@ dnl variable want_debug value as appropriate. 
AC_DEFUN([CURL_CHECK_OPTION_DEBUG], [

  AC_BEFORE([$0],[CURL_CHECK_OPTION_WARNINGS])dnl

  AC_BEFORE([$0],[CURL_CHECK_OPTION_CURLDEBUG])dnl

  AC_BEFORE([$0],[CURL_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,
@@ -177,7 +177,7 @@ dnl shell variable want_optimize value as appropriate. 


AC_DEFUN([CURL_CHECK_OPTION_OPTIMIZE], [

  AC_REQUIRE([CURL_CHECK_OPTION_DEBUG])dnl

  AC_BEFORE([$0],[CURL_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,
@@ -326,7 +326,7 @@ dnl shell variable want_warnings as appropriate. 
AC_DEFUN([CURL_CHECK_OPTION_WARNINGS], [

  AC_REQUIRE([CURL_CHECK_OPTION_DEBUG])dnl

  AC_BEFORE([$0],[CURL_CHECK_OPTION_WERROR])dnl

  AC_BEFORE([$0],[CURL_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,

m4/xc-cc-check.m4

0 → 100644
+102 −0
Original line number Diff line number Diff line 
#---------------------------------------------------------------------------

#

# 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

  export CC

  export CPP

  export LIBS

  export CFLAGS

  export LDFLAGS

  export 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

])

m4/xc-val-flgs.m4

0 → 100644
+243 −0
Original line number Diff line number Diff line 
#---------------------------------------------------------------------------

#

# 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

])