build: Update with newer autoconf constructs.

* configure.ac: Use AC_USE_SYSTEM_EXTENSIONS instead of AC_GNU_SOURCE.
Use AS_HELP_STRING instead of AC_HELP_STRING.
* m4/libtool.m4: Update from libgpg-error.
* m4/gpg-error.m4: Update from libgpg-error.
* m4/libassuan.m4: Update from libassuan.

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>

configure.ac

@@ -19,7 +19,7 @@
 # SPDX-License-Identifier: LGPL-2.1-or-later
 
 # (Process this file with autoconf to produce a configure script.)
-AC_PREREQ(2.59)
+AC_PREREQ([2.59])
 min_automake_version="1.14"
 
 # To build a release you need to create a tag with the version number
@@ -45,7 +45,7 @@ m4_define([mym4_version],      m4_argn(4, mym4_verslist))
 m4_define([mym4_revision],     m4_argn(7, mym4_verslist))
 m4_define([mym4_revision_dec], m4_argn(8, mym4_verslist))
 m4_esyscmd([echo ]mym4_version[>VERSION])
-AC_INIT([mym4_package],[mym4_version], [https://bugs.gnupg.org])
+AC_INIT([mym4_package],[mym4_version],[https://bugs.gnupg.org])
 
 # LT Version numbers, remember to change them just *before* a release.
 #   (Code changed:			REVISION++)
@@ -105,7 +105,7 @@ AM_SILENT_RULES
 AC_ARG_VAR(SYSROOT,[locate config scripts also below that directory])
 
 # Enable GNU extensions on systems that have them.
-AC_GNU_SOURCE
+AC_USE_SYSTEM_EXTENSIONS
 
 # Taken from mpfr-4.0.1, then modified for LDADD_FOR_TESTS_KLUDGE
 dnl Under Linux, make sure that the old dtags are used if LD_LIBRARY_PATH
@@ -243,7 +243,7 @@ case "${host}" in
 
 	AM_PATH_GLIB_2_0
 	AC_ARG_ENABLE(w32-glib,
-	    AC_HELP_STRING([--enable-w32-glib], [build GPGME Glib for W32]),
+	    AS_HELP_STRING([--enable-w32-glib],[build GPGME Glib for W32]),
 	    		   build_w32_glib=$enableval)
        ;;
     *)
@@ -291,7 +291,7 @@ AM_CONDITIONAL(BUILD_W32_GLIB, test "$build_w32_glib" = yes)
 
 
 AC_ARG_ENABLE([fixed-path],
-              AC_HELP_STRING([--enable-fixed-path=PATH],
+              AS_HELP_STRING([--enable-fixed-path=PATH],
                              [locate binaries only via this PATH]),
               [fixed_search_path="$enableval"],
               [fixed_search_path=""])
@@ -304,7 +304,7 @@ fi
 # Note: You need to declare all possible languages also in
 #       lang/Makefile.am's DIST_SUBDIRS.
 AC_ARG_ENABLE([languages],
-              AC_HELP_STRING([--enable-languages=languages],
+              AS_HELP_STRING([--enable-languages=languages],
                              [enable only specific language bindings]),
                              [enabled_languages=`echo $enableval | \
                              tr ',:' '  ' | tr '[A-Z]' '[a-z]' | \
@@ -494,7 +494,7 @@ AC_SUBST(BUILD_VERSION)
 AC_SUBST(BUILD_FILEVERSION)
 
 AC_ARG_ENABLE([build-timestamp],
-  AC_HELP_STRING([--enable-build-timestamp],
+  AS_HELP_STRING([--enable-build-timestamp],
                  [set an explicit build timestamp for reproducibility.
                   (default is the current time in ISO-8601 format)]),
      [if test "$enableval" = "yes"; then
@@ -513,25 +513,25 @@ AC_DEFINE_UNQUOTED(BUILD_TIMESTAMP, "$BUILD_TIMESTAMP",
 #
 run_gpgconf_test="yes"
 AC_ARG_ENABLE(gpgconf-test,
-  AC_HELP_STRING([--disable-gpgconf-test], [disable GPGCONF regression test]),
+  AS_HELP_STRING([--disable-gpgconf-test],[disable GPGCONF regression test]),
          run_gpgconf_test=$enableval)
 AM_CONDITIONAL(RUN_GPGCONF_TESTS, test "$run_gpgconf_test" = "yes")
 
 run_gpg_test="yes"
 AC_ARG_ENABLE(gpg-test,
-  AC_HELP_STRING([--disable-gpg-test], [disable GPG regression test]),
+  AS_HELP_STRING([--disable-gpg-test],[disable GPG regression test]),
          run_gpg_test=$enableval)
 AM_CONDITIONAL(RUN_GPG_TESTS, test "$run_gpg_test" = "yes")
 
 run_gpgsm_test="yes"
 AC_ARG_ENABLE(gpgsm-test,
-  AC_HELP_STRING([--disable-gpgsm-test], [disable GPGSM regression test]),
+  AS_HELP_STRING([--disable-gpgsm-test],[disable GPGSM regression test]),
          run_gpgsm_test=$enableval)
 AM_CONDITIONAL(RUN_GPGSM_TESTS, test "$run_gpgsm_test" = "yes")
 
 run_g13_test="yes"
 AC_ARG_ENABLE(g13-test,
-  AC_HELP_STRING([--disable-g13-test], [disable G13 regression test]),
+  AS_HELP_STRING([--disable-g13-test],[disable G13 regression test]),
          run_g13_test=$enableval)
 AM_CONDITIONAL(RUN_G13_TESTS, test "$run_g13_test" = "yes")
 
@@ -750,7 +750,7 @@ AC_CHECK_MEMBER(struct cmsghdr.cmsg_len,
 
 use_descriptor_passing=yes
 AC_ARG_ENABLE(fd-passing,
-  AC_HELP_STRING([--disable-fd-passing], [do not use FD passing]),
+  AS_HELP_STRING([--disable-fd-passing],[do not use FD passing]),
   use_descriptor_passing=$enableval)
 
 if test "$supports_descriptor_passing" != "yes"; then
@@ -782,7 +782,7 @@ AM_CONDITIONAL(HAVE_UISERVER, test "$uiserver" != "no")
 # before an exec.  This option allows to switch this optimization off.
 use_linux_getdents=yes
 AC_ARG_ENABLE(linux-getdents,
-              AC_HELP_STRING([--disable-linux-getdents],
+              AS_HELP_STRING([--disable-linux-getdents],
                              [do not use SYS_getdents on Linux]),
               use_linux_getdents=$enableval)
 if test "$use_linux_getdents" = "yes"; then

m4/gpg-error.m4

@@ -1,5 +1,5 @@
 # gpg-error.m4 - autoconf macro to detect libgpg-error.
-# Copyright (C) 2002, 2003, 2004, 2011, 2014, 2018 g10 Code GmbH
+# Copyright (C) 2002, 2003, 2004, 2011, 2014, 2018, 2020 g10 Code GmbH
 #
 # This file is free software; as a special exception the author gives
 # unlimited permission to copy and/or distribute it, with or without
@@ -9,7 +9,7 @@
 # WITHOUT ANY WARRANTY, to the extent permitted by law; without even the
 # implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 #
-# Last-changed: 2018-11-02
+# Last-changed: 2020-11-17
 
 
 dnl AM_PATH_GPG_ERROR([MINIMUM-VERSION,
@@ -31,7 +31,7 @@ AC_DEFUN([AM_PATH_GPG_ERROR],
   dnl since that is consistent with how our three siblings use the directory/
   dnl package name in --with-$dir_name-prefix=PFX.
   AC_ARG_WITH(libgpg-error-prefix,
-              AC_HELP_STRING([--with-libgpg-error-prefix=PFX],
+              AS_HELP_STRING([--with-libgpg-error-prefix=PFX],
                              [prefix where GPG Error is installed (optional)]),
               [gpg_error_config_prefix="$withval"])
 

m4/libassuan.m4

@@ -9,6 +9,7 @@ dnl This file is distributed in the hope that it will be useful, but
 dnl WITHOUT ANY WARRANTY, to the extent permitted by law; without even the
 dnl implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 dnl SPDX-License-Identifier: FSFULLR
+# Last-changed: 2020-11-17
 
 dnl
 dnl Common code used for libassuan detection [internal]
@@ -17,7 +18,7 @@ dnl
 AC_DEFUN([_AM_PATH_LIBASSUAN_COMMON],
 [ AC_REQUIRE([AC_CANONICAL_HOST])
   AC_ARG_WITH(libassuan-prefix,
-              AC_HELP_STRING([--with-libassuan-prefix=PFX],
+              AS_HELP_STRING([--with-libassuan-prefix=PFX],
                              [prefix where LIBASSUAN is installed (optional)]),
      libassuan_config_prefix="$withval", libassuan_config_prefix="")
   if test x$libassuan_config_prefix != x ; then

m4/libtool.m4

@@ -1326,7 +1326,10 @@ s390*-*linux*|s390*-*tpf*|sparc*-*linux*)
 	  x86_64-*linux*)
 	    LD="${LD-ld} -m elf_i386"
 	    ;;
-	  ppc64-*linux*|powerpc64-*linux*)
+         powerpc64le-*)
+           LD="${LD-ld} -m elf32lppclinux"
+           ;;
+         powerpc64-*)
 	    LD="${LD-ld} -m elf32ppclinux"
 	    ;;
 	  s390x-*linux*)
@@ -1345,7 +1348,10 @@ s390*-*linux*|s390*-*tpf*|sparc*-*linux*)
 	  x86_64-*linux*)
 	    LD="${LD-ld} -m elf_x86_64"
 	    ;;
-	  ppc*-*linux*|powerpc*-*linux*)
+         powerpcle-*)
+           LD="${LD-ld} -m elf64lppc"
+           ;;
+         powerpc-*)
 	    LD="${LD-ld} -m elf64ppc"
 	    ;;
 	  s390*-*linux*|s390*-*tpf*)
@@ -2638,6 +2644,26 @@ linux*oldld* | linux*aout* | linux*coff*)
   dynamic_linker=no
   ;;
 
+linux*android*)
+  version_type=none # Android doesn't support versioned libraries.
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='$libname$release$shared_ext'
+  soname_spec='$libname$release$shared_ext'
+  finish_cmds=
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=yes
+
+  # This implies no fast_install, which is unacceptable.
+  # Some rework will be needed to allow for fast_install
+  # before this can be enabled.
+  hardcode_into_libs=yes
+
+  dynamic_linker='Android linker'
+  # Don't embed -rpath directories since the linker doesn't support them.
+  _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-L$libdir'
+  ;;
+
 # This must be glibc/ELF.
 linux* | k*bsd*-gnu | kopensolaris*-gnu)
   version_type=linux # correct to gnu/linux during the next big refactor
@@ -7448,7 +7474,7 @@ AC_LANG_POP
 # to write the compiler configuration to `libtool'.
 m4_defun([_LT_LANG_GCJ_CONFIG],
 [AC_REQUIRE([LT_PROG_GCJ])dnl
-AC_LANG_SAVE
+AC_LANG_PUSH([Java])
 
 # Source file extension for Java test sources.
 ac_ext=java
@@ -7504,7 +7530,7 @@ if test -n "$compiler"; then
   _LT_CONFIG($1)
 fi
 
-AC_LANG_RESTORE
+AC_LANG_POP
 
 GCC=$lt_save_GCC
 CC=$lt_save_CC
@@ -7519,7 +7545,7 @@ CFLAGS=$lt_save_CFLAGS
 # to write the compiler configuration to `libtool'.
 m4_defun([_LT_LANG_GO_CONFIG],
 [AC_REQUIRE([LT_PROG_GO])dnl
-AC_LANG_SAVE
+AC_LANG_PUSH([Go])
 
 # Source file extension for Go test sources.
 ac_ext=go
@@ -7575,7 +7601,7 @@ if test -n "$compiler"; then
   _LT_CONFIG($1)
 fi
 
-AC_LANG_RESTORE
+AC_LANG_POP
 
 GCC=$lt_save_GCC
 CC=$lt_save_CC
@@ -7590,7 +7616,9 @@ CFLAGS=$lt_save_CFLAGS
 # to write the compiler configuration to `libtool'.
 m4_defun([_LT_LANG_RC_CONFIG],
 [AC_REQUIRE([LT_PROG_RC])dnl
-AC_LANG_SAVE
+
+dnl Here, something like AC_LANG_PUSH([RC]) is expected.
+dnl But Resource Compiler is not supported as a language by autoconf
 
 # Source file extension for RC test sources.
 ac_ext=rc
@@ -7629,8 +7657,10 @@ if test -n "$compiler"; then
   _LT_CONFIG($1)
 fi
 
+dnl Here, AC_LANG_POP is expected.
 GCC=$lt_save_GCC
-AC_LANG_RESTORE
+dnl Back to C
+AC_LANG([C])
 CC=$lt_save_CC
 CFLAGS=$lt_save_CFLAGS
 ])# _LT_LANG_RC_CONFIG