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    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: ])