tools/missing-macros/src/m4/lib-prefix.m4

   1 # lib-prefix.m4 serial 7 (gettext-0.18)
   2 dnl Copyright (C) 2001-2005, 2008-2010 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
 157 dnl - a variable acl_libdirstem, containing the basename of the libdir, either
 158 dnl   "lib" or "lib64" or "lib/64",
 159 dnl - a variable acl_libdirstem2, as a secondary possible value for
 160 dnl   acl_libdirstem, either the same as acl_libdirstem or "lib/sparcv9" or
 161 dnl   "lib/amd64".
 162 AC_DEFUN([AC_LIB_PREPARE_MULTILIB],
 163 [
 164   dnl There is no formal standard regarding lib and lib64.
 165   dnl On glibc systems, the current practice is that on a system supporting
 166   dnl 32-bit and 64-bit instruction sets or ABIs, 64-bit libraries go under
 167   dnl $prefix/lib64 and 32-bit libraries go under $prefix/lib. We determine
 168   dnl the compiler's default mode by looking at the compiler's library search
 169   dnl path. If at least one of its elements ends in /lib64 or points to a
 170   dnl directory whose absolute pathname ends in /lib64, we assume a 64-bit ABI.
 171   dnl Otherwise we use the default, namely "lib".
 172   dnl On Solaris systems, the current practice is that on a system supporting
 173   dnl 32-bit and 64-bit instruction sets or ABIs, 64-bit libraries go under
 174   dnl $prefix/lib/64 (which is a symlink to either $prefix/lib/sparcv9 or
 175   dnl $prefix/lib/amd64) and 32-bit libraries go under $prefix/lib.
 176   AC_REQUIRE([AC_CANONICAL_HOST])
 177   acl_libdirstem=lib
 178   acl_libdirstem2=
 179   case "$host_os" in
 180     solaris*)
 181       dnl See Solaris 10 Software Developer Collection > Solaris 64-bit Developer's Guide > The Development Environment
 182       dnl <http://docs.sun.com/app/docs/doc/816-5138/dev-env?l=en&a=view>.
 183       dnl "Portable Makefiles should refer to any library directories using the 64 symbolic link."
 184       dnl But we want to recognize the sparcv9 or amd64 subdirectory also if the
 185       dnl symlink is missing, so we set acl_libdirstem2 too.
 186       AC_CACHE_CHECK([for 64-bit host], [gl_cv_solaris_64bit],
 187         [AC_EGREP_CPP([sixtyfour bits], [
 188 #ifdef _LP64
 189 sixtyfour bits
 190 #endif
 191            ], [gl_cv_solaris_64bit=yes], [gl_cv_solaris_64bit=no])
 192         ])
 193       if test $gl_cv_solaris_64bit = yes; then
 194         acl_libdirstem=lib/64
 195         case "$host_cpu" in
 196           sparc*)        acl_libdirstem2=lib/sparcv9 ;;
 197           i*86 | x86_64) acl_libdirstem2=lib/amd64 ;;
 198         esac
 199       fi
 200       ;;
 201     *)
 202       searchpath=`(LC_ALL=C $CC -print-search-dirs) 2>/dev/null | sed -n -e 's,^libraries: ,,p' | sed -e 's,^=,,'`
 203       if test -n "$searchpath"; then
 204         acl_save_IFS="${IFS=    }"; IFS=":"
 205         for searchdir in $searchpath; do
 206           if test -d "$searchdir"; then
 207             case "$searchdir" in
 208               */lib64/ | */lib64 ) acl_libdirstem=lib64 ;;
 209               */../ | */.. )
 210                 # Better ignore directories of this form. They are misleading.
 211                 ;;
 212               *) searchdir=`cd "$searchdir" && pwd`
 213                  case "$searchdir" in
 214                    */lib64 ) acl_libdirstem=lib64 ;;
 215                  esac ;;
 216             esac
 217           fi
 218         done
 219         IFS="$acl_save_IFS"
 220       fi
 221       ;;
 222   esac
 223   test -n "$acl_libdirstem2" || acl_libdirstem2="$acl_libdirstem"
 224 ])