- 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 <http://docs.sun.com/app/docs/doc/816-5138/dev-env?l=en&a=view>.
- 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_EGREP_CPP([sixtyfour bits], [
-#ifdef _LP64
-sixtyfour bits
-#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
- ;;
- *)
- searchpath=`(LC_ALL=C $CC -print-search-dirs) 2>/dev/null | sed -n -e 's,^libraries: ,,p' | sed -e 's,^=,,'`
- if test -n "$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
- test -n "$acl_libdirstem2" || acl_libdirstem2="$acl_libdirstem"
+ AC_REQUIRE([gl_HOST_CPU_C_ABI_32BIT])
+
+ AC_CACHE_CHECK([for ELF binary format], [gl_cv_elf],
+ [AC_EGREP_CPP([Extensible Linking Format],
+ [#ifdef __ELF__
+ Extensible Linking Format
+ #endif
+ ],
+ [gl_cv_elf=yes],
+ [gl_cv_elf=no])
+ ])
+ if test $gl_cv_elf; then
+ # Extract the ELF class of a file (5th byte) in decimal.
+ # Cf. https://en.wikipedia.org/wiki/Executable_and_Linkable_Format#File_header
+ if od -A x < /dev/null >/dev/null 2>/dev/null; then
+ # Use POSIX od.
+ func_elfclass ()
+ {
+ od -A n -t d1 -j 4 -N 1
+ }
+ else
+ # Use BSD hexdump.
+ func_elfclass ()
+ {
+ dd bs=1 count=1 skip=4 2>/dev/null | hexdump -e '1/1 "%3d "'
+ echo
+ }
+ fi
+changequote(,)dnl
+ case $HOST_CPU_C_ABI_32BIT in
+ yes)
+ # 32-bit ABI.
+ acl_is_expected_elfclass ()
+ {
+ test "`func_elfclass | sed -e 's/[ ]//g'`" = 1
+ }
+ ;;
+ no)
+ # 64-bit ABI.
+ acl_is_expected_elfclass ()
+ {
+ test "`func_elfclass | sed -e 's/[ ]//g'`" = 2
+ }
+ ;;
+ *)
+ # Unknown.
+ acl_is_expected_elfclass ()
+ {
+ :
+ }
+ ;;
+ esac
+changequote([,])dnl
+ else
+ acl_is_expected_elfclass ()
+ {
+ :
+ }
+ fi
+
+ dnl Allow the user to override the result by setting acl_cv_libdirstems.
+ AC_CACHE_CHECK([for the common suffixes of directories in the library search path],
+ [acl_cv_libdirstems],
+ [dnl Try 'lib' first, because that's the default for libdir in GNU, see
+ dnl <https://www.gnu.org/prep/standards/html_node/Directory-Variables.html>.
+ acl_libdirstem=lib
+ acl_libdirstem2=
+ acl_libdirstem3=
+ case "$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.
+ if test $HOST_CPU_C_ABI_32BIT = no; then
+ acl_libdirstem2=lib/64
+ case "$host_cpu" in
+ sparc*) acl_libdirstem3=lib/sparcv9 ;;
+ i*86 | x86_64) acl_libdirstem3=lib/amd64 ;;
+ esac
+ fi
+ ;;
+ *)
+ dnl If $CC generates code for a 32-bit ABI, the libraries are
+ dnl surely under $prefix/lib or $prefix/lib32, not $prefix/lib64.
+ dnl Similarly, if $CC generates code for a 64-bit ABI, the libraries
+ dnl are surely under $prefix/lib or $prefix/lib64, not $prefix/lib32.
+ dnl Find the compiler's search path. However, non-system compilers
+ dnl sometimes have odd library search paths. But we can't simply invoke
+ dnl '/usr/bin/gcc -print-search-dirs' because that would not take into
+ dnl account the -m32/-m31 or -m64 options from the $CC or $CFLAGS.
+ searchpath=`(LC_ALL=C $CC $CPPFLAGS $CFLAGS -print-search-dirs) 2>/dev/null \
+ | sed -n -e 's,^libraries: ,,p' | sed -e 's,^=,,'`
+ if test $HOST_CPU_C_ABI_32BIT != no; then
+ # 32-bit or unknown ABI.
+ if test -d /usr/lib32; then
+ acl_libdirstem2=lib32
+ fi
+ fi
+ if test $HOST_CPU_C_ABI_32BIT != yes; then
+ # 64-bit or unknown ABI.
+ if test -d /usr/lib64; then
+ acl_libdirstem3=lib64
+ fi
+ fi
+ if test -n "$searchpath"; then
+ acl_save_IFS="${IFS= }"; IFS=":"
+ for searchdir in $searchpath; do
+ if test -d "$searchdir"; then
+ case "$searchdir" in
+ */lib32/ | */lib32 ) acl_libdirstem2=lib32 ;;
+ */lib64/ | */lib64 ) acl_libdirstem3=lib64 ;;
+ */../ | */.. )
+ # Better ignore directories of this form. They are misleading.
+ ;;
+ *) searchdir=`cd "$searchdir" && pwd`
+ case "$searchdir" in
+ */lib32 ) acl_libdirstem2=lib32 ;;
+ */lib64 ) acl_libdirstem3=lib64 ;;
+ esac ;;
+ esac
+ fi
+ done
+ IFS="$acl_save_IFS"
+ if test $HOST_CPU_C_ABI_32BIT = yes; then
+ # 32-bit ABI.
+ acl_libdirstem3=
+ fi
+ if test $HOST_CPU_C_ABI_32BIT = no; then
+ # 64-bit ABI.
+ acl_libdirstem2=
+ fi
+ fi
+ ;;
+ esac
+ test -n "$acl_libdirstem2" || acl_libdirstem2="$acl_libdirstem"
+ test -n "$acl_libdirstem3" || acl_libdirstem3="$acl_libdirstem"
+ acl_cv_libdirstems="$acl_libdirstem,$acl_libdirstem2,$acl_libdirstem3"
+ ])
+ dnl Decompose acl_cv_libdirstems into acl_libdirstem, acl_libdirstem2, and
+ dnl acl_libdirstem3.
+changequote(,)dnl
+ acl_libdirstem=`echo "$acl_cv_libdirstems" | sed -e 's/,.*//'`
+ acl_libdirstem2=`echo "$acl_cv_libdirstems" | sed -e 's/^[^,]*,//' -e 's/,.*//'`
+ acl_libdirstem3=`echo "$acl_cv_libdirstems" | sed -e 's/^[^,]*,[^,]*,//' -e 's/,.*//'`
+changequote([,])dnl