Annotation of embedaddon/confuse/m4/lib-prefix.m4, revision 1.1

1.1     ! misho       1: # lib-prefix.m4 serial 5 (gettext-0.15)
        !             2: dnl Copyright (C) 2001-2005 Free Software Foundation, Inc.
        !             3: dnl This file is free software; the Free Software Foundation
        !             4: dnl gives unlimited permission to copy and/or distribute it,
        !             5: dnl with or without modifications, as long as this notice is preserved.
        !             6: 
        !             7: dnl From Bruno Haible.
        !             8: 
        !             9: dnl AC_LIB_ARG_WITH is synonymous to AC_ARG_WITH in autoconf-2.13, and
        !            10: dnl similar to AC_ARG_WITH in autoconf 2.52...2.57 except that is doesn't
        !            11: dnl require excessive bracketing.
        !            12: ifdef([AC_HELP_STRING],
        !            13: [AC_DEFUN([AC_LIB_ARG_WITH], [AC_ARG_WITH([$1],[[$2]],[$3],[$4])])],
        !            14: [AC_DEFUN([AC_][LIB_ARG_WITH], [AC_ARG_WITH([$1],[$2],[$3],[$4])])])
        !            15: 
        !            16: dnl AC_LIB_PREFIX adds to the CPPFLAGS and LDFLAGS the flags that are needed
        !            17: dnl to access previously installed libraries. The basic assumption is that
        !            18: dnl a user will want packages to use other packages he previously installed
        !            19: dnl with the same --prefix option.
        !            20: dnl This macro is not needed if only AC_LIB_LINKFLAGS is used to locate
        !            21: dnl libraries, but is otherwise very convenient.
        !            22: AC_DEFUN([AC_LIB_PREFIX],
        !            23: [
        !            24:   AC_BEFORE([$0], [AC_LIB_LINKFLAGS])
        !            25:   AC_REQUIRE([AC_PROG_CC])
        !            26:   AC_REQUIRE([AC_CANONICAL_HOST])
        !            27:   AC_REQUIRE([AC_LIB_PREPARE_MULTILIB])
        !            28:   AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
        !            29:   dnl By default, look in $includedir and $libdir.
        !            30:   use_additional=yes
        !            31:   AC_LIB_WITH_FINAL_PREFIX([
        !            32:     eval additional_includedir=\"$includedir\"
        !            33:     eval additional_libdir=\"$libdir\"
        !            34:   ])
        !            35:   AC_LIB_ARG_WITH([lib-prefix],
        !            36: [  --with-lib-prefix[=DIR] search for libraries in DIR/include and DIR/lib
        !            37:   --without-lib-prefix    don't search for libraries in includedir and libdir],
        !            38: [
        !            39:     if test "X$withval" = "Xno"; then
        !            40:       use_additional=no
        !            41:     else
        !            42:       if test "X$withval" = "X"; then
        !            43:         AC_LIB_WITH_FINAL_PREFIX([
        !            44:           eval additional_includedir=\"$includedir\"
        !            45:           eval additional_libdir=\"$libdir\"
        !            46:         ])
        !            47:       else
        !            48:         additional_includedir="$withval/include"
        !            49:         additional_libdir="$withval/$acl_libdirstem"
        !            50:       fi
        !            51:     fi
        !            52: ])
        !            53:   if test $use_additional = yes; then
        !            54:     dnl Potentially add $additional_includedir to $CPPFLAGS.
        !            55:     dnl But don't add it
        !            56:     dnl   1. if it's the standard /usr/include,
        !            57:     dnl   2. if it's already present in $CPPFLAGS,
        !            58:     dnl   3. if it's /usr/local/include and we are using GCC on Linux,
        !            59:     dnl   4. if it doesn't exist as a directory.
        !            60:     if test "X$additional_includedir" != "X/usr/include"; then
        !            61:       haveit=
        !            62:       for x in $CPPFLAGS; do
        !            63:         AC_LIB_WITH_FINAL_PREFIX([eval x=\"$x\"])
        !            64:         if test "X$x" = "X-I$additional_includedir"; then
        !            65:           haveit=yes
        !            66:           break
        !            67:         fi
        !            68:       done
        !            69:       if test -z "$haveit"; then
        !            70:         if test "X$additional_includedir" = "X/usr/local/include"; then
        !            71:           if test -n "$GCC"; then
        !            72:             case $host_os in
        !            73:               linux* | gnu* | k*bsd*-gnu) haveit=yes;;
        !            74:             esac
        !            75:           fi
        !            76:         fi
        !            77:         if test -z "$haveit"; then
        !            78:           if test -d "$additional_includedir"; then
        !            79:             dnl Really add $additional_includedir to $CPPFLAGS.
        !            80:             CPPFLAGS="${CPPFLAGS}${CPPFLAGS:+ }-I$additional_includedir"
        !            81:           fi
        !            82:         fi
        !            83:       fi
        !            84:     fi
        !            85:     dnl Potentially add $additional_libdir to $LDFLAGS.
        !            86:     dnl But don't add it
        !            87:     dnl   1. if it's the standard /usr/lib,
        !            88:     dnl   2. if it's already present in $LDFLAGS,
        !            89:     dnl   3. if it's /usr/local/lib and we are using GCC on Linux,
        !            90:     dnl   4. if it doesn't exist as a directory.
        !            91:     if test "X$additional_libdir" != "X/usr/$acl_libdirstem"; then
        !            92:       haveit=
        !            93:       for x in $LDFLAGS; do
        !            94:         AC_LIB_WITH_FINAL_PREFIX([eval x=\"$x\"])
        !            95:         if test "X$x" = "X-L$additional_libdir"; then
        !            96:           haveit=yes
        !            97:           break
        !            98:         fi
        !            99:       done
        !           100:       if test -z "$haveit"; then
        !           101:         if test "X$additional_libdir" = "X/usr/local/$acl_libdirstem"; then
        !           102:           if test -n "$GCC"; then
        !           103:             case $host_os in
        !           104:               linux*) haveit=yes;;
        !           105:             esac
        !           106:           fi
        !           107:         fi
        !           108:         if test -z "$haveit"; then
        !           109:           if test -d "$additional_libdir"; then
        !           110:             dnl Really add $additional_libdir to $LDFLAGS.
        !           111:             LDFLAGS="${LDFLAGS}${LDFLAGS:+ }-L$additional_libdir"
        !           112:           fi
        !           113:         fi
        !           114:       fi
        !           115:     fi
        !           116:   fi
        !           117: ])
        !           118: 
        !           119: dnl AC_LIB_PREPARE_PREFIX creates variables acl_final_prefix,
        !           120: dnl acl_final_exec_prefix, containing the values to which $prefix and
        !           121: dnl $exec_prefix will expand at the end of the configure script.
        !           122: AC_DEFUN([AC_LIB_PREPARE_PREFIX],
        !           123: [
        !           124:   dnl Unfortunately, prefix and exec_prefix get only finally determined
        !           125:   dnl at the end of configure.
        !           126:   if test "X$prefix" = "XNONE"; then
        !           127:     acl_final_prefix="$ac_default_prefix"
        !           128:   else
        !           129:     acl_final_prefix="$prefix"
        !           130:   fi
        !           131:   if test "X$exec_prefix" = "XNONE"; then
        !           132:     acl_final_exec_prefix='${prefix}'
        !           133:   else
        !           134:     acl_final_exec_prefix="$exec_prefix"
        !           135:   fi
        !           136:   acl_save_prefix="$prefix"
        !           137:   prefix="$acl_final_prefix"
        !           138:   eval acl_final_exec_prefix=\"$acl_final_exec_prefix\"
        !           139:   prefix="$acl_save_prefix"
        !           140: ])
        !           141: 
        !           142: dnl AC_LIB_WITH_FINAL_PREFIX([statement]) evaluates statement, with the
        !           143: dnl variables prefix and exec_prefix bound to the values they will have
        !           144: dnl at the end of the configure script.
        !           145: AC_DEFUN([AC_LIB_WITH_FINAL_PREFIX],
        !           146: [
        !           147:   acl_save_prefix="$prefix"
        !           148:   prefix="$acl_final_prefix"
        !           149:   acl_save_exec_prefix="$exec_prefix"
        !           150:   exec_prefix="$acl_final_exec_prefix"
        !           151:   $1
        !           152:   exec_prefix="$acl_save_exec_prefix"
        !           153:   prefix="$acl_save_prefix"
        !           154: ])
        !           155: 
        !           156: dnl AC_LIB_PREPARE_MULTILIB creates a variable acl_libdirstem, containing
        !           157: dnl the basename of the libdir, either "lib" or "lib64".
        !           158: AC_DEFUN([AC_LIB_PREPARE_MULTILIB],
        !           159: [
        !           160:   dnl There is no formal standard regarding lib and lib64. The current
        !           161:   dnl practice is that on a system supporting 32-bit and 64-bit instruction
        !           162:   dnl sets or ABIs, 64-bit libraries go under $prefix/lib64 and 32-bit
        !           163:   dnl libraries go under $prefix/lib. We determine the compiler's default
        !           164:   dnl mode by looking at the compiler's library search path. If at least
        !           165:   dnl of its elements ends in /lib64 or points to a directory whose absolute
        !           166:   dnl pathname ends in /lib64, we assume a 64-bit ABI. Otherwise we use the
        !           167:   dnl default, namely "lib".
        !           168:   acl_libdirstem=lib
        !           169:   searchpath=`(LC_ALL=C $CC -print-search-dirs) 2>/dev/null | sed -n -e 's,^libraries: ,,p' | sed -e 's,^=,,'`
        !           170:   if test -n "$searchpath"; then
        !           171:     acl_save_IFS="${IFS=       }"; IFS=":"
        !           172:     for searchdir in $searchpath; do
        !           173:       if test -d "$searchdir"; then
        !           174:         case "$searchdir" in
        !           175:           */lib64/ | */lib64 ) acl_libdirstem=lib64 ;;
        !           176:           *) searchdir=`cd "$searchdir" && pwd`
        !           177:              case "$searchdir" in
        !           178:                */lib64 ) acl_libdirstem=lib64 ;;
        !           179:              esac ;;
        !           180:         esac
        !           181:       fi
        !           182:     done
        !           183:     IFS="$acl_save_IFS"
        !           184:   fi
        !           185: ])

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