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Diffstat (limited to 'm4/perl.m4')
| -rw-r--r-- | m4/perl.m4 | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/m4/perl.m4 b/m4/perl.m4 new file mode 100644 index 0000000..6080c3d --- /dev/null +++ b/m4/perl.m4 @@ -0,0 +1,107 @@ +dnl Probe for Perl properties and, optionally, flags for embedding Perl. +dnl +dnl Provides the following macros: +dnl +dnl RRA_PROG_PERL +dnl Checks for a specific Perl version and sets the PERL environment +dnl variable to the full path, or aborts the configure run if the version +dnl of Perl is not new enough or couldn't be found. Marks PERL as a +dnl substitution variable. +dnl +dnl RRA_PERL_CHECK_MODULE +dnl Checks for the existence of a Perl module. Runs the second argument +dnl if it is present and the third if it is not. +dnl +dnl RRA_LIB_PERL +dnl Determines the flags required for embedding Perl and sets +dnl PERL_CPPFLAGS and PERL_LIBS. +dnl +dnl RRA_PROG_PERL should generally be called before the other two macros. If +dnl it isn't, the PERL environment variable must be set in some other way. +dnl (It cannot be run automatically via dependencies because it takes a +dnl mandatory minimum version argument, which should be provided by the +dnl calling configure script.) +dnl +dnl The canonical version of this file is maintained in the rra-c-util +dnl package, available at <https://www.eyrie.org/~eagle/software/rra-c-util/>. +dnl +dnl Copyright 2016, 2018 Russ Allbery <eagle@eyrie.org> +dnl Copyright 2006, 2009, 2011 Internet Systems Consortium, Inc. ("ISC") +dnl Copyright 1998-2003 The Internet Software Consortium +dnl +dnl Permission to use, copy, modify, and distribute this software for any +dnl purpose with or without fee is hereby granted, provided that the above +dnl copyright notice and this permission notice appear in all copies. +dnl +dnl THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH +dnl REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF +dnl MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY +dnl SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES +dnl WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN +dnl ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR +dnl IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. +dnl +dnl SPDX-License-Identifier: ISC + +dnl Check for the path to Perl and ensure it meets our minimum version +dnl requirement (given as the argument). Honor the $PERL environment +dnl variable, if set. +AC_DEFUN([RRA_PROG_PERL], +[AC_ARG_VAR([PERL], [Location of Perl interpreter]) + AS_IF([test x"$PERL" != x], + [AS_IF([! test -x "$PERL"], + [AC_MSG_ERROR([Perl binary $PERL not found])]) + AS_IF([! "$PERL" -e 'use $1' >/dev/null 2>&1], + [AC_MSG_ERROR([Perl $1 or greater is required])])], + [AC_CACHE_CHECK([for Perl version $1 or later], [ac_cv_path_PERL], + [AC_PATH_PROGS_FEATURE_CHECK([PERL], [perl], + [AS_IF(["$ac_path_PERL" -e 'require $1' >/dev/null 2>&1], + [ac_cv_path_PERL="$ac_path_PERL" + ac_path_PERL_found=:])])]) + AS_IF([test x"$ac_cv_path_PERL" = x], + [AC_MSG_ERROR([Perl $1 or greater is required])]) + PERL="$ac_cv_path_PERL" + AC_SUBST([PERL])])]) + +dnl Check whether a given Perl module can be loaded. Runs the second argument +dnl if it can, and the third argument if it cannot. +AC_DEFUN([RRA_PERL_CHECK_MODULE], +[AS_LITERAL_IF([$1], [], [m4_fatal([$0: requires literal arguments])])dnl + AS_VAR_PUSHDEF([ac_Module], [rra_cv_perl_module_$1])dnl + AC_CACHE_CHECK([for Perl module $1], [ac_Module], + [AS_IF(["$PERL" -e 'use $1' >/dev/null 2>&1], + [AS_VAR_SET([ac_Module], [yes])], + [AS_VAR_SET([ac_Module], [no])])]) + AS_VAR_IF([ac_Module], [yes], [$2], [$3]) + AS_VAR_POPDEF([ac_Module])]) + +dnl Determine the flags used for embedding Perl. +dnl +dnl Some distributions of Linux have Perl linked with gdbm but don't normally +dnl have gdbm installed, so on that platform only strip -lgdbm out of the Perl +dnl libraries. Leave it in on other platforms where it may be necessary (it +dnl isn't on Linux; Linux shared libraries can manage their own dependencies). +dnl Strip -lc out, which is added on some platforms, is unnecessary, and +dnl breaks compiles with -pthread (which may be added by Python). +AC_DEFUN([RRA_LIB_PERL], +[AC_REQUIRE([AC_CANONICAL_HOST]) + AC_SUBST([PERL_CPPFLAGS]) + AC_SUBST([PERL_LIBS]) + AC_MSG_CHECKING([for flags to link with Perl]) + rra_perl_core_path=`"$PERL" -MConfig -e 'print $Config{archlibexp}'` + rra_perl_core_flags=`"$PERL" -MExtUtils::Embed -e ccopts` + rra_perl_core_libs=`"$PERL" -MExtUtils::Embed -e ldopts 2>&1 | tail -n 1` + rra_perl_core_libs=" $rra_perl_core_libs " + rra_perl_core_libs=`echo "$rra_perl_core_libs" | sed 's/ -lc / /'` + AS_CASE([$host], + [*-linux*], + [rra_perl_core_libs=`echo "$rra_perl_core_libs" | sed 's/ -lgdbm / /'`], + [*-cygwin*], + [rra_perl_libname=`"$PERL" -MConfig -e 'print $Config{libperl}'` + rra_perl_libname=`echo "$rra_perl_libname" | sed 's/^lib//; s/\.a$//'` + rra_perl_core_libs="${rra_perl_core_libs}-l$rra_perl_libname"]) + rra_perl_core_libs=`echo "$rra_perl_core_libs" | sed 's/^ *//'` + rra_perl_core_libs=`echo "$rra_perl_core_libs" | sed 's/ *$//'` + PERL_CPPFLAGS="$rra_perl_core_flags" + PERL_LIBS="$rra_perl_core_libs" + AC_MSG_RESULT([$PERL_LIBS])]) |