# lib-prefix.m4 serial 11

dnl Copyright (C) 2001-2005, 2008-2018 Free Software Foundation, Inc.

dnl This file is free software; the Free Software Foundation

dnl gives unlimited permission to copy and/or distribute it,

dnl with or without modifications, as long as this notice is preserved.

dnl From Bruno Haible.

dnl AC_LIB_ARG_WITH is synonymous to AC_ARG_WITH in autoconf-2.13, and

dnl similar to AC_ARG_WITH in autoconf 2.52...2.57 except that is doesn't

dnl require excessive bracketing.

ifdef([AC_HELP_STRING],

[AC_DEFUN([AC_LIB_ARG_WITH], [AC_ARG_WITH([$1],[[$2]],[$3],[$4])])],

[AC_DEFUN([AC_][LIB_ARG_WITH], [AC_ARG_WITH([$1],[$2],[$3],[$4])])])

dnl AC_LIB_PREFIX adds to the CPPFLAGS and LDFLAGS the flags that are needed

dnl to access previously installed libraries. The basic assumption is that

dnl a user will want packages to use other packages he previously installed

dnl with the same --prefix option.

dnl This macro is not needed if only AC_LIB_LINKFLAGS is used to locate

dnl libraries, but is otherwise very convenient.

AC_DEFUN([AC_LIB_PREFIX],

[

  AC_BEFORE([$0], [AC_LIB_LINKFLAGS])

  AC_REQUIRE([AC_PROG_CC])

  AC_REQUIRE([AC_CANONICAL_HOST])

  AC_REQUIRE([AC_LIB_PREPARE_MULTILIB])

  AC_REQUIRE([AC_LIB_PREPARE_PREFIX])

  dnl By default, look in $includedir and $libdir.

  use_additional=yes

  AC_LIB_WITH_FINAL_PREFIX([

    eval additional_includedir=\"$includedir\"

    eval additional_libdir=\"$libdir\"

  ])

  AC_LIB_ARG_WITH([lib-prefix],

[  --with-lib-prefix[=DIR] search for libraries in DIR/include and DIR/lib

  --without-lib-prefix    don't search for libraries in includedir and libdir],

[

    if test "X$withval" = "Xno"; then

      use_additional=no

    else

      if test "X$withval" = "X"; then

        AC_LIB_WITH_FINAL_PREFIX([

          eval additional_includedir=\"$includedir\"

          eval additional_libdir=\"$libdir\"

        ])

      else

        additional_includedir="$withval/include"

        additional_libdir="$withval/$acl_libdirstem"

      fi

    fi

])

  if test $use_additional = yes; then

    dnl Potentially add $additional_includedir to $CPPFLAGS.

    dnl But don't add it

    dnl   1. if it's the standard /usr/include,

    dnl   2. if it's already present in $CPPFLAGS,

    dnl   3. if it's /usr/local/include and we are using GCC on Linux,

    dnl   4. if it doesn't exist as a directory.

    if test "X$additional_includedir" != "X/usr/include"; then

      haveit=

      for x in $CPPFLAGS; do

        AC_LIB_WITH_FINAL_PREFIX([eval x=\"$x\"])

        if test "X$x" = "X-I$additional_includedir"; then

          haveit=yes

          break

        fi

      done

      if test -z "$haveit"; then

        if test "X$additional_includedir" = "X/usr/local/include"; then

          if test -n "$GCC"; then

            case $host_os in

              linux* | gnu* | k*bsd*-gnu) haveit=yes;;

            esac

          fi

        fi

        if test -z "$haveit"; then

          if test -d "$additional_includedir"; then

            dnl Really add $additional_includedir to $CPPFLAGS.

            CPPFLAGS="${CPPFLAGS}${CPPFLAGS:+ }-I$additional_includedir"

          fi

        fi

      fi

    fi

    dnl Potentially add $additional_libdir to $LDFLAGS.

    dnl But don't add it

    dnl   1. if it's the standard /usr/lib,

    dnl   2. if it's already present in $LDFLAGS,

    dnl   3. if it's /usr/local/lib and we are using GCC on Linux,

    dnl   4. if it doesn't exist as a directory.

    if test "X$additional_libdir" != "X/usr/$acl_libdirstem"; then

      haveit=

      for x in $LDFLAGS; do

        AC_LIB_WITH_FINAL_PREFIX([eval x=\"$x\"])

        if test "X$x" = "X-L$additional_libdir"; then

          haveit=yes

          break

        fi

      done

      if test -z "$haveit"; then

        if test "X$additional_libdir" = "X/usr/local/$acl_libdirstem"; then

          if test -n "$GCC"; then

            case $host_os in

              linux*) haveit=yes;;

            esac

          fi

        fi

        if test -z "$haveit"; then

          if test -d "$additional_libdir"; then

            dnl Really add $additional_libdir to $LDFLAGS.

            LDFLAGS="${LDFLAGS}${LDFLAGS:+ }-L$additional_libdir"

          fi

        fi

      fi

    fi

  fi

])

dnl AC_LIB_PREPARE_PREFIX creates variables acl_final_prefix,

dnl acl_final_exec_prefix, containing the values to which $prefix and

dnl $exec_prefix will expand at the end of the configure script.

AC_DEFUN([AC_LIB_PREPARE_PREFIX],

[

  dnl Unfortunately, prefix and exec_prefix get only finally determined

  dnl at the end of configure.

  if test "X$prefix" = "XNONE"; then

    acl_final_prefix="$ac_default_prefix"

  else

    acl_final_prefix="$prefix"

  fi

  if test "X$exec_prefix" = "XNONE"; then

    acl_final_exec_prefix='${prefix}'

  else

    acl_final_exec_prefix="$exec_prefix"

  fi

  acl_save_prefix="$prefix"

  prefix="$acl_final_prefix"

  eval acl_final_exec_prefix=\"$acl_final_exec_prefix\"

  prefix="$acl_save_prefix"

])

dnl AC_LIB_WITH_FINAL_PREFIX([statement]) evaluates statement, with the

dnl variables prefix and exec_prefix bound to the values they will have

dnl at the end of the configure script.

AC_DEFUN([AC_LIB_WITH_FINAL_PREFIX],

[

  acl_save_prefix="$prefix"

  prefix="$acl_final_prefix"

  acl_save_exec_prefix="$exec_prefix"

  exec_prefix="$acl_final_exec_prefix"

  $1

  exec_prefix="$acl_save_exec_prefix"

  prefix="$acl_save_prefix"

])

dnl AC_LIB_PREPARE_MULTILIB creates

dnl - a variable acl_libdirstem, containing the basename of the libdir, either

dnl   "lib" or "lib64" or "lib/64",

dnl - a variable acl_libdirstem2, as a secondary possible value for

dnl   acl_libdirstem, either the same as acl_libdirstem or "lib/sparcv9" or

dnl   "lib/amd64".

AC_DEFUN([AC_LIB_PREPARE_MULTILIB],

[

  dnl There is no formal standard regarding lib and lib64.

  dnl On glibc systems, the current practice is that on a system supporting

  dnl 32-bit and 64-bit instruction sets or ABIs, 64-bit libraries go under

  dnl $prefix/lib64 and 32-bit libraries go under $prefix/lib. We determine

  dnl the compiler's default mode by looking at the compiler's library search

  dnl path. If at least one of its elements ends in /lib64 or points to a

  dnl directory whose absolute pathname ends in /lib64, we assume a 64-bit ABI.

  dnl Otherwise we use the default, namely "lib".

  dnl On Solaris systems, the current practice is that on a system supporting

  dnl 32-bit and 64-bit instruction sets or ABIs, 64-bit libraries go under

  dnl $prefix/lib/64 (which is a symlink to either $prefix/lib/sparcv9 or

  dnl $prefix/lib/amd64) and 32-bit libraries go under $prefix/lib.

  AC_REQUIRE([AC_CANONICAL_HOST])

  AC_REQUIRE([gl_HOST_CPU_C_ABI])

  dnl Allow the user to override the result by setting acl_cv_libdirstems.

  AC_CACHE_CHECK([for the common suffixes of directories in the library search path],

    [acl_cv_libdirstems],

    [acl_libdirstem=lib

     acl_libdirstem2=

     case "$host_os" in

       solaris*)

         dnl See Solaris 10 Software Developer Collection > Solaris 64-bit Developer's Guide > The Development Environment

         dnl <https://docs.oracle.com/cd/E19253-01/816-5138/dev-env/index.html>.

         dnl "Portable Makefiles should refer to any library directories using the 64 symbolic link."

         dnl But we want to recognize the sparcv9 or amd64 subdirectory also if the

         dnl symlink is missing, so we set acl_libdirstem2 too.

         AC_CACHE_CHECK([for 64-bit host], [gl_cv_solaris_64bit],

           [AC_COMPILE_IFELSE(

              [AC_LANG_SOURCE(

                 [[#ifdef _LP64

                    int ok;

                   #else

                    error fail

                   #endif

                 ]])],

              [gl_cv_solaris_64bit=yes],

              [gl_cv_solaris_64bit=no])

           ])

         if test $gl_cv_solaris_64bit = yes; then

           acl_libdirstem=lib/64

           case "$host_cpu" in

             sparc*)        acl_libdirstem2=lib/sparcv9 ;;

             i*86 | x86_64) acl_libdirstem2=lib/amd64 ;;

           esac

         fi

         ;;

       *)

         dnl If $CC generates code for a 32-bit ABI, the libraries are

         dnl surely under $prefix/lib, not $prefix/lib64.

         case "$gl_cv_host_cpu_c_abi" in

           i386 | arm | armhf | arm64-ilp32 | hppa | ia64-ilp32 | mips | mipsn32 | powerpc | s390 | sparc)

             ;;

           *) # x86_64 | arm64 | hppa64 | ia64 | mips64 | powerpc64* | s390x | sparc64 | ...

             dnl The result is a property of the system. However, non-system

             dnl compilers sometimes have odd library search paths. Therefore

             dnl prefer asking /usr/bin/gcc, if available, rather than $CC.

             searchpath=`(if test -f /usr/bin/gcc \

                             && LC_ALL=C /usr/bin/gcc -print-search-dirs >/dev/null 2>/dev/null; then \

                            LC_ALL=C /usr/bin/gcc -print-search-dirs; \

                          else \

                            LC_ALL=C $CC -print-search-dirs; \

                          fi) 2>/dev/null \

                         | sed -n -e 's,^libraries: ,,p' | sed -e 's,^=,,'`

             if test -n "$searchpath"; then

               acl_save_IFS="${IFS= 	}"; IFS=":"

               for searchdir in $searchpath; do

                 if test -d "$searchdir"; then

                   case "$searchdir" in

                     */lib64/ | */lib64 ) acl_libdirstem=lib64 ;;

                     */../ | */.. )

                       # Better ignore directories of this form. They are misleading.

                       ;;

                     *) searchdir=`cd "$searchdir" && pwd`

                        case "$searchdir" in

                          */lib64 ) acl_libdirstem=lib64 ;;

                        esac ;;

                   esac

                 fi

               done

               IFS="$acl_save_IFS"

             fi

             ;;

         esac

         ;;

     esac

     test -n "$acl_libdirstem2" || acl_libdirstem2="$acl_libdirstem"

     acl_cv_libdirstems="$acl_libdirstem,$acl_libdirstem2"

    ])

  # Decompose acl_cv_libdirstems into acl_libdirstem and acl_libdirstem2.

  acl_libdirstem=`echo "$acl_cv_libdirstems" | sed -e 's/,.*//'`

  acl_libdirstem2=`echo "$acl_cv_libdirstems" | sed -e '/,/s/.*,//'`

])