diff options
Diffstat (limited to 'acinclude.m4')
| -rw-r--r-- | acinclude.m4 | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/acinclude.m4 b/acinclude.m4 index 552e6c810..6e62f988d 100644 --- a/acinclude.m4 +++ b/acinclude.m4 @@ -766,3 +766,58 @@ AC_DEFUN([CURL_CC_DEBUG_OPTS], ]) dnl end of AC_DEFUN() + +dnl Determine the name of the library to pass to dlopen() based on the name +dnl that would normally be given to AC_CHECK_LIB. The preprocessor symbol +dnl given is set to the quoted library file name. +dnl The standard dynamic library file name is first generated, based on the +dnl current system type, then a search is performed for that file on the +dnl standard dynamic library path. If it is a symbolic link, the destination +dnl of the link is used as the file name, after stripping off any minor +dnl version numbers. If a library file can't be found, a guess is made. +dnl This macro assumes AC_PROG_LIBTOOL has been called and requires perl +dnl to be available. +dnl +dnl CURL_DLLIB_NAME(VARIABLE, library_name) +dnl e.g. CURL_DLLIB_NAME(LDAP_NAME, ldap) on a Linux system might result +dnl in LDAP_NAME holding the string "libldap.so.2". + +AC_DEFUN([CURL_DLLIB_NAME], +[ +AC_MSG_CHECKING([name of dynamic library $2]) + +dnl Create the dynamic library name of the correct form for this platform +DLGUESSLIB=`name=$2 eval echo "$libname_spec"` +DLGUESSFILE=`libname=$DLGUESSLIB release="" major="" eval echo "$soname_spec"` + +if test "$cross_compiling" = yes; then + dnl Can't look at filesystem when cross-compiling + AC_DEFINE_UNQUOTED($1, "$DLGUESSFILE", [$2 dynamic library file]) + AC_MSG_RESULT([$DLGUESSFILE (guess while cross-compiling)]) +else + + DLFOUNDFILE="" + if test "$sys_lib_dlsearch_path_spec" ; then + for direc in $sys_lib_dlsearch_path_spec ; do + DLTRYFILE="$direc/$DLGUESSFILE" + dnl Find where the symbolic link for this name points + changequote(<<, >>)dnl + << + DLFOUNDFILE=`perl -e 'use File::Basename; (basename(readlink($ARGV[0])) =~ /^(.*[^\d]\.\d+)[\d\.]*$/ && print ${1}) || exit 1;' "$DLTRYFILE" 2>&5` + >> + changequote([, ])dnl + if test "$?" -eq "0"; then + dnl Found the file link + break + fi + done + fi + + if test -z "$DLFOUNDFILE" ; then + DLFOUNDFILE="$DLGUESSFILE" + fi + + AC_DEFINE_UNQUOTED($1, "$DLFOUNDFILE", [$2 dynamic library file]) + AC_MSG_RESULT($DLFOUNDFILE) +fi +]) |