[gnome-photos] build: Update all AX_* macros from upstream

From: Debarshi Ray <debarshir src gnome org>
To: commits-list gnome org
Cc:
Subject: [gnome-photos] build: Update all AX_* macros from upstream
Date: Wed, 7 Jun 2017 19:37:45 +0000 (UTC)
commit 548c27eb80f806e94adfbf6061b897518f650aa4
Author: Debarshi Ray <debarshir gnome org>
Date:   Wed Jun 7 21:32:18 2017 +0200

    build: Update all AX_* macros from upstream

 m4/ax_append_compile_flags.m4   |   16 +++++----
 m4/ax_append_flag.m4            |    8 ++--
 m4/ax_check_compile_flag.m4     |    6 ++--
 m4/ax_check_enable_debug.m4     |   72 +++++++++++++++++++-------------------
 m4/ax_compiler_flags.m4         |    6 ++--
 m4/ax_compiler_flags_cflags.m4  |   19 +++++++---
 m4/ax_compiler_flags_gir.m4     |    6 ++--
 m4/ax_compiler_flags_ldflags.m4 |   41 +++++++++++++++------
 m4/ax_is_release.m4             |   19 ++++++++--
 m4/ax_require_defined.m4        |    4 +-
 10 files changed, 117 insertions(+), 80 deletions(-)
---
diff --git a/m4/ax_append_compile_flags.m4 b/m4/ax_append_compile_flags.m4
index dc7b866..5b6f1af 100644
--- a/m4/ax_append_compile_flags.m4
+++ b/m4/ax_append_compile_flags.m4
@@ -1,10 +1,10 @@
-# ===========================================================================
-#  http://www.gnu.org/software/autoconf-archive/ax_append_compile_flags.html
-# ===========================================================================
+# ============================================================================
+#  https://www.gnu.org/software/autoconf-archive/ax_append_compile_flags.html
+# ============================================================================
 #
 # SYNOPSIS
 #
-#   AX_APPEND_COMPILE_FLAGS([FLAG1 FLAG2 ...], [FLAGS-VARIABLE], [EXTRA-FLAGS])
+#   AX_APPEND_COMPILE_FLAGS([FLAG1 FLAG2 ...], [FLAGS-VARIABLE], [EXTRA-FLAGS], [INPUT])
 #
 # DESCRIPTION
 #
@@ -20,6 +20,8 @@
 #   the flags: "CFLAGS EXTRA-FLAGS FLAG".  This can for example be used to
 #   force the compiler to issue an error when a bad flag is given.
 #
+#   INPUT gives an alternative input source to AC_COMPILE_IFELSE.
+#
 #   NOTE: This macro depends on the AX_APPEND_FLAG and
 #   AX_CHECK_COMPILE_FLAG. Please keep this macro in sync with
 #   AX_APPEND_LINK_FLAGS.
@@ -39,7 +41,7 @@
 #   Public License for more details.
 #
 #   You should have received a copy of the GNU General Public License along
-#   with this program. If not, see <http://www.gnu.org/licenses/>.
+#   with this program. If not, see <https://www.gnu.org/licenses/>.
 #
 #   As a special exception, the respective Autoconf Macro's copyright owner
 #   gives unlimited permission to copy, distribute and modify the configure
@@ -54,12 +56,12 @@
 #   modified version of the Autoconf Macro, you may extend this special
 #   exception to the GPL to apply to your modified version as well.
 
-#serial 4
+#serial 6
 
 AC_DEFUN([AX_APPEND_COMPILE_FLAGS],
 [AX_REQUIRE_DEFINED([AX_CHECK_COMPILE_FLAG])
 AX_REQUIRE_DEFINED([AX_APPEND_FLAG])
 for flag in $1; do
-  AX_CHECK_COMPILE_FLAG([$flag], [AX_APPEND_FLAG([$flag], [$2])], [], [$3])
+  AX_CHECK_COMPILE_FLAG([$flag], [AX_APPEND_FLAG([$flag], [$2])], [], [$3], [$4])
 done
 ])dnl AX_APPEND_COMPILE_FLAGS
diff --git a/m4/ax_append_flag.m4 b/m4/ax_append_flag.m4
index aeab899..e8c5312 100644
--- a/m4/ax_append_flag.m4
+++ b/m4/ax_append_flag.m4
@@ -1,5 +1,5 @@
 # ===========================================================================
-#      http://www.gnu.org/software/autoconf-archive/ax_append_flag.html
+#      https://www.gnu.org/software/autoconf-archive/ax_append_flag.html
 # ===========================================================================
 #
 # SYNOPSIS
@@ -34,7 +34,7 @@
 #   Public License for more details.
 #
 #   You should have received a copy of the GNU General Public License along
-#   with this program. If not, see <http://www.gnu.org/licenses/>.
+#   with this program. If not, see <https://www.gnu.org/licenses/>.
 #
 #   As a special exception, the respective Autoconf Macro's copyright owner
 #   gives unlimited permission to copy, distribute and modify the configure
@@ -49,7 +49,7 @@
 #   modified version of the Autoconf Macro, you may extend this special
 #   exception to the GPL to apply to your modified version as well.
 
-#serial 5
+#serial 7
 
 AC_DEFUN([AX_APPEND_FLAG],
 [dnl
@@ -59,7 +59,7 @@ AS_VAR_SET_IF(FLAGS,[
   AS_CASE([" AS_VAR_GET(FLAGS) "],
     [*" $1 "*], [AC_RUN_LOG([: FLAGS already contains $1])],
     [
-     AS_VAR_APPEND(FLAGS," $1")
+     AS_VAR_APPEND(FLAGS,[" $1"])
      AC_RUN_LOG([: FLAGS="$FLAGS"])
     ])
   ],
diff --git a/m4/ax_check_compile_flag.m4 b/m4/ax_check_compile_flag.m4
index ca36397..dcabb92 100644
--- a/m4/ax_check_compile_flag.m4
+++ b/m4/ax_check_compile_flag.m4
@@ -1,5 +1,5 @@
 # ===========================================================================
-#   http://www.gnu.org/software/autoconf-archive/ax_check_compile_flag.html
+#  https://www.gnu.org/software/autoconf-archive/ax_check_compile_flag.html
 # ===========================================================================
 #
 # SYNOPSIS
@@ -40,7 +40,7 @@
 #   Public License for more details.
 #
 #   You should have received a copy of the GNU General Public License along
-#   with this program. If not, see <http://www.gnu.org/licenses/>.
+#   with this program. If not, see <https://www.gnu.org/licenses/>.
 #
 #   As a special exception, the respective Autoconf Macro's copyright owner
 #   gives unlimited permission to copy, distribute and modify the configure
@@ -55,7 +55,7 @@
 #   modified version of the Autoconf Macro, you may extend this special
 #   exception to the GPL to apply to your modified version as well.
 
-#serial 4
+#serial 5
 
 AC_DEFUN([AX_CHECK_COMPILE_FLAG],
 [AC_PREREQ(2.64)dnl for _AC_LANG_PREFIX and AS_VAR_IF
diff --git a/m4/ax_check_enable_debug.m4 b/m4/ax_check_enable_debug.m4
index f99d75f..d36bcdf 100644
--- a/m4/ax_check_enable_debug.m4
+++ b/m4/ax_check_enable_debug.m4
@@ -1,5 +1,5 @@
 # ===========================================================================
-#   http://www.gnu.org/software/autoconf-archive/ax_check_enable_debug.html
+#  https://www.gnu.org/software/autoconf-archive/ax_check_enable_debug.html
 # ===========================================================================
 #
 # SYNOPSIS
@@ -42,7 +42,7 @@
 #   permitted in any medium without royalty provided the copyright notice
 #   and this notice are preserved.
 
-#serial 5
+#serial 8
 
 AC_DEFUN([AX_CHECK_ENABLE_DEBUG],[
     AC_BEFORE([$0],[AC_PROG_CC])dnl
@@ -65,8 +65,8 @@ AC_DEFUN([AX_CHECK_ENABLE_DEBUG],[
     m4_define(ax_disable_debug_vars,[m4_normalize(ifelse([$3],,[NDEBUG],[$3]))])
 
     AC_ARG_ENABLE(debug,
-       [AS_HELP_STRING([--enable-debug=]@<:@yes/info/profile/no@:>@,[compile with debugging])],
-       [],enable_debug=$ax_enable_debug_default)
+        [AS_HELP_STRING([--enable-debug=]@<:@yes/info/profile/no@:>@,[compile with debugging])],
+        [],enable_debug=$ax_enable_debug_default)
 
     # empty mean debug yes
     AS_IF([test "x$enable_debug" = "x"],
@@ -75,44 +75,44 @@ AC_DEFUN([AX_CHECK_ENABLE_DEBUG],[
     # case of debug
     AS_CASE([$enable_debug],
       [yes],[
-       AC_MSG_RESULT(yes)
-       CFLAGS="${CFLAGS} -g -O0"
-       CXXFLAGS="${CXXFLAGS} -g -O0"
-       FFLAGS="${FFLAGS} -g -O0"
-       FCFLAGS="${FCFLAGS} -g -O0"
-       OBJCFLAGS="${OBJCFLAGS} -g -O0"
+        AC_MSG_RESULT(yes)
+        CFLAGS="${CFLAGS} -g -O0"
+        CXXFLAGS="${CXXFLAGS} -g -O0"
+        FFLAGS="${FFLAGS} -g -O0"
+        FCFLAGS="${FCFLAGS} -g -O0"
+        OBJCFLAGS="${OBJCFLAGS} -g -O0"
       ],
       [info],[
-       AC_MSG_RESULT(info)
-       CFLAGS="${CFLAGS} -g"
-       CXXFLAGS="${CXXFLAGS} -g"
-       FFLAGS="${FFLAGS} -g"
-       FCFLAGS="${FCFLAGS} -g"
-       OBJCFLAGS="${OBJCFLAGS} -g"
+        AC_MSG_RESULT(info)
+        CFLAGS="${CFLAGS} -g"
+        CXXFLAGS="${CXXFLAGS} -g"
+        FFLAGS="${FFLAGS} -g"
+        FCFLAGS="${FCFLAGS} -g"
+        OBJCFLAGS="${OBJCFLAGS} -g"
       ],
       [profile],[
-       AC_MSG_RESULT(profile)
-       CFLAGS="${CFLAGS} -g -pg"
-       CXXFLAGS="${CXXFLAGS} -g -pg"
-       FFLAGS="${FFLAGS} -g -pg"
-       FCFLAGS="${FCFLAGS} -g -pg"
-       OBJCFLAGS="${OBJCFLAGS} -g -pg"
-       LDFLAGS="${LDFLAGS} -pg"
+        AC_MSG_RESULT(profile)
+        CFLAGS="${CFLAGS} -g -pg"
+        CXXFLAGS="${CXXFLAGS} -g -pg"
+        FFLAGS="${FFLAGS} -g -pg"
+        FCFLAGS="${FCFLAGS} -g -pg"
+        OBJCFLAGS="${OBJCFLAGS} -g -pg"
+        LDFLAGS="${LDFLAGS} -pg"
       ],
       [
-       AC_MSG_RESULT(no)
-       dnl Ensure AC_PROG_CC/CXX/F77/FC/OBJC will not enable debug flags
-       dnl by setting any unset environment flag variables
-       AS_IF([test "x${CFLAGS+set}" != "xset"],
-         [CFLAGS=""])
-       AS_IF([test "x${CXXFLAGS+set}" != "xset"],
-         [CXXFLAGS=""])
-       AS_IF([test "x${FFLAGS+set}" != "xset"],
-         [FFLAGS=""])
-       AS_IF([test "x${FCFLAGS+set}" != "xset"],
-         [FCFLAGS=""])
-       AS_IF([test "x${OBJCFLAGS+set}" != "xset"],
-         [OBJCFLAGS=""])
+        AC_MSG_RESULT(no)
+        dnl Ensure AC_PROG_CC/CXX/F77/FC/OBJC will not enable debug flags
+        dnl by setting any unset environment flag variables
+        AS_IF([test "x${CFLAGS+set}" != "xset"],
+          [CFLAGS=""])
+        AS_IF([test "x${CXXFLAGS+set}" != "xset"],
+          [CXXFLAGS=""])
+        AS_IF([test "x${FFLAGS+set}" != "xset"],
+          [FFLAGS=""])
+        AS_IF([test "x${FCFLAGS+set}" != "xset"],
+          [FCFLAGS=""])
+        AS_IF([test "x${OBJCFLAGS+set}" != "xset"],
+          [OBJCFLAGS=""])
       ])
 
     dnl Define various variables if debugging is disabled.
diff --git a/m4/ax_compiler_flags.m4 b/m4/ax_compiler_flags.m4
index c52ae7d..ddb0456 100644
--- a/m4/ax_compiler_flags.m4
+++ b/m4/ax_compiler_flags.m4
@@ -1,5 +1,5 @@
 # ===========================================================================
-#     http://www.gnu.org/software/autoconf-archive/ax_compiler_flags.html
+#    https://www.gnu.org/software/autoconf-archive/ax_compiler_flags.html
 # ===========================================================================
 #
 # SYNOPSIS
@@ -101,7 +101,7 @@
 #   and this notice are preserved.  This file is offered as-is, without any
 #   warranty.
 
-#serial 12
+#serial 14
 
 # _AX_COMPILER_FLAGS_LANG([LANGNAME])
 m4_defun([_AX_COMPILER_FLAGS_LANG],
@@ -138,7 +138,7 @@ AC_DEFUN([AX_COMPILER_FLAGS],[
                                  [Unconditionally make all compiler warnings non-fatal]),,
                   [enable_Werror=maybe])
 
-    # Return the user’s chosen warning level
+    # Return the user's chosen warning level
     AS_IF([test "$enable_Werror" = "no" -a \
                 "$enable_compile_warnings" = "error"],[
         enable_compile_warnings="yes"
diff --git a/m4/ax_compiler_flags_cflags.m4 b/m4/ax_compiler_flags_cflags.m4
index f470f8f..aeb16e3 100644
--- a/m4/ax_compiler_flags_cflags.m4
+++ b/m4/ax_compiler_flags_cflags.m4
@@ -1,6 +1,6 @@
-# ============================================================================
-#  http://www.gnu.org/software/autoconf-archive/ax_compiler_flags_cflags.html
-# ============================================================================
+# =============================================================================
+#  https://www.gnu.org/software/autoconf-archive/ax_compiler_flags_cflags.html
+# =============================================================================
 #
 # SYNOPSIS
 #
@@ -25,7 +25,7 @@
 #   and this notice are preserved.  This file is offered as-is, without any
 #   warranty.
 
-#serial 11
+#serial 14
 
 AC_DEFUN([AX_COMPILER_FLAGS_CFLAGS],[
     AC_REQUIRE([AC_PROG_SED])
@@ -34,7 +34,7 @@ AC_DEFUN([AX_COMPILER_FLAGS_CFLAGS],[
     AX_REQUIRE_DEFINED([AX_CHECK_COMPILE_FLAG])
 
     # Variable names
-    m4_define(ax_warn_cflags_variable,
+    m4_define([ax_warn_cflags_variable],
               [m4_normalize(ifelse([$1],,[WARN_CFLAGS],[$1]))])
 
     AC_LANG_PUSH([C])
@@ -50,6 +50,13 @@ AC_DEFUN([AX_COMPILER_FLAGS_CFLAGS],[
         ax_compiler_flags_test=""
     ])
 
+    # Check that -Wno-suggest-attribute=format is supported
+    AX_CHECK_COMPILE_FLAG([-Wno-suggest-attribute=format],[
+        ax_compiler_no_suggest_attribute_flags="-Wno-suggest-attribute=format"
+    ],[
+        ax_compiler_no_suggest_attribute_flags=""
+    ])
+
     # Base flags
     AX_APPEND_COMPILE_FLAGS([ dnl
         -fno-strict-aliasing dnl
@@ -108,7 +115,7 @@ AC_DEFUN([AX_COMPILER_FLAGS_CFLAGS],[
         AX_APPEND_FLAG([-Werror],ax_warn_cflags_variable)
 
         AX_APPEND_COMPILE_FLAGS([ dnl
-            -Wno-suggest-attribute=format dnl
+            [$ax_compiler_no_suggest_attribute_flags] dnl
         ],ax_warn_cflags_variable,[$ax_compiler_flags_test])
     ])
 
diff --git a/m4/ax_compiler_flags_gir.m4 b/m4/ax_compiler_flags_gir.m4
index 180f50d..5b4924a 100644
--- a/m4/ax_compiler_flags_gir.m4
+++ b/m4/ax_compiler_flags_gir.m4
@@ -1,5 +1,5 @@
 # ===========================================================================
-#   http://www.gnu.org/software/autoconf-archive/ax_compiler_flags_gir.html
+#  https://www.gnu.org/software/autoconf-archive/ax_compiler_flags_gir.html
 # ===========================================================================
 #
 # SYNOPSIS
@@ -26,13 +26,13 @@
 #   and this notice are preserved.  This file is offered as-is, without any
 #   warranty.
 
-#serial 4
+#serial 6
 
 AC_DEFUN([AX_COMPILER_FLAGS_GIR],[
     AX_REQUIRE_DEFINED([AX_APPEND_FLAG])
 
     # Variable names
-    m4_define(ax_warn_scannerflags_variable,
+    m4_define([ax_warn_scannerflags_variable],
               [m4_normalize(ifelse([$1],,[WARN_SCANNERFLAGS],[$1]))])
 
     # Base flags
diff --git a/m4/ax_compiler_flags_ldflags.m4 b/m4/ax_compiler_flags_ldflags.m4
index f9077fc..842e329 100644
--- a/m4/ax_compiler_flags_ldflags.m4
+++ b/m4/ax_compiler_flags_ldflags.m4
@@ -1,6 +1,6 @@
-# =============================================================================
-#  http://www.gnu.org/software/autoconf-archive/ax_compiler_flags_ldflags.html
-# =============================================================================
+# ==============================================================================
+#  https://www.gnu.org/software/autoconf-archive/ax_compiler_flags_ldflags.html
+# ==============================================================================
 #
 # SYNOPSIS
 #
@@ -25,15 +25,16 @@
 #   and this notice are preserved.  This file is offered as-is, without any
 #   warranty.
 
-#serial 3
+#serial 8
 
 AC_DEFUN([AX_COMPILER_FLAGS_LDFLAGS],[
-    AX_REQUIRE_DEFINED([AX_APPEND_COMPILE_FLAGS])
+    AX_REQUIRE_DEFINED([AX_APPEND_LINK_FLAGS])
     AX_REQUIRE_DEFINED([AX_APPEND_FLAG])
     AX_REQUIRE_DEFINED([AX_CHECK_COMPILE_FLAG])
+    AX_REQUIRE_DEFINED([AX_CHECK_LINK_FLAG])
 
     # Variable names
-    m4_define(ax_warn_ldflags_variable,
+    m4_define([ax_warn_ldflags_variable],
               [m4_normalize(ifelse([$1],,[WARN_LDFLAGS],[$1]))])
 
     # Always pass -Werror=unknown-warning-option to get Clang to fail on bad
@@ -47,26 +48,42 @@ AC_DEFUN([AX_COMPILER_FLAGS_LDFLAGS],[
         ax_compiler_flags_test=""
     ])
 
+    # macOS linker does not have --as-needed
+    AX_CHECK_LINK_FLAG([-Wl,--no-as-needed], [
+        ax_compiler_flags_as_needed_option="-Wl,--no-as-needed"
+    ], [
+        ax_compiler_flags_as_needed_option=""
+    ])
+
+    # macOS linker speaks with a different accent
+    ax_compiler_flags_fatal_warnings_option=""
+    AX_CHECK_LINK_FLAG([-Wl,--fatal-warnings], [
+        ax_compiler_flags_fatal_warnings_option="-Wl,--fatal-warnings"
+    ])
+    AX_CHECK_LINK_FLAG([-Wl,-fatal_warnings], [
+        ax_compiler_flags_fatal_warnings_option="-Wl,-fatal_warnings"
+    ])
+
     # Base flags
-    AX_APPEND_COMPILE_FLAGS([ dnl
-        -Wl,--no-as-needed dnl
+    AX_APPEND_LINK_FLAGS([ dnl
+        $ax_compiler_flags_as_needed_option dnl
         $3 dnl
     ],ax_warn_ldflags_variable,[$ax_compiler_flags_test])
 
     AS_IF([test "$ax_enable_compile_warnings" != "no"],[
         # "yes" flags
-        AX_APPEND_COMPILE_FLAGS([$4 $5 $6 $7],
+        AX_APPEND_LINK_FLAGS([$4 $5 $6 $7],
                                 ax_warn_ldflags_variable,
                                 [$ax_compiler_flags_test])
     ])
     AS_IF([test "$ax_enable_compile_warnings" = "error"],[
         # "error" flags; -Werror has to be appended unconditionally because
-        # it’s not possible to test for
+        # it's not possible to test for
         #
         # suggest-attribute=format is disabled because it gives too many false
         # positives
-        AX_APPEND_COMPILE_FLAGS([ dnl
-            -Wl,--fatal-warnings dnl
+        AX_APPEND_LINK_FLAGS([ dnl
+            $ax_compiler_flags_fatal_warnings_option dnl
         ],ax_warn_ldflags_variable,[$ax_compiler_flags_test])
     ])
 
diff --git a/m4/ax_is_release.m4 b/m4/ax_is_release.m4
index 9ec6746..9097ddb 100644
--- a/m4/ax_is_release.m4
+++ b/m4/ax_is_release.m4
@@ -1,5 +1,5 @@
 # ===========================================================================
-#       http://www.gnu.org/software/autoconf-archive/ax_is_release.html
+#      https://www.gnu.org/software/autoconf-archive/ax_is_release.html
 # ===========================================================================
 #
 # SYNOPSIS
@@ -26,6 +26,10 @@
 #    * micro-version:  ax_is_release will be 'no' if the micro version number
 #                      in $PACKAGE_VERSION is odd; this assumes
 #                      $PACKAGE_VERSION follows the 'major.minor.micro' scheme
+#    * dash-version:   ax_is_release will be 'no' if there is a dash '-'
+#                      in $PACKAGE_VERSION, for example 1.2-pre3, 1.2.42-a8b9
+#                      or 2.0-dirty (in particular this is suitable for use
+#                      with git-version-gen)
 #    * always:         ax_is_release will always be 'yes'
 #    * never:          ax_is_release will always be 'no'
 #
@@ -34,12 +38,13 @@
 # LICENSE
 #
 #   Copyright (c) 2015 Philip Withnall <philip tecnocode co uk>
+#   Copyright (c) 2016 Collabora Ltd.
 #
 #   Copying and distribution of this file, with or without modification, are
 #   permitted in any medium without royalty provided the copyright notice
 #   and this notice are preserved.
 
-#serial 3
+#serial 7
 
 AC_DEFUN([AX_IS_RELEASE],[
     AC_BEFORE([AC_INIT],[$0])
@@ -47,7 +52,7 @@ AC_DEFUN([AX_IS_RELEASE],[
     m4_case([$1],
       [git-directory],[
         # $is_release = (.git directory does not exist)
-        AS_IF([test -d .git],[ax_is_release=no],[ax_is_release=yes])
+        AS_IF([test -d ${srcdir}/.git],[ax_is_release=no],[ax_is_release=yes])
       ],
       [minor-version],[
         # $is_release = ($minor_version is even)
@@ -61,9 +66,15 @@ AC_DEFUN([AX_IS_RELEASE],[
         AS_IF([test "$(( $micro_version % 2 ))" -ne 0],
               [ax_is_release=no],[ax_is_release=yes])
       ],
+      [dash-version],[
+        # $is_release = ($PACKAGE_VERSION has a dash)
+        AS_CASE([$PACKAGE_VERSION],
+                [*-*], [ax_is_release=no],
+                [*], [ax_is_release=yes])
+      ],
       [always],[ax_is_release=yes],
       [never],[ax_is_release=no],
       [
-        AC_MSG_ERROR([Invalid policy. Valid policies: git-directory, minor-version.])
+        AC_MSG_ERROR([Invalid policy. Valid policies: git-directory, minor-version, micro-version, 
dash-version, always, never.])
       ])
 ])
diff --git a/m4/ax_require_defined.m4 b/m4/ax_require_defined.m4
index cae1111..17c3eab 100644
--- a/m4/ax_require_defined.m4
+++ b/m4/ax_require_defined.m4
@@ -1,5 +1,5 @@
 # ===========================================================================
-#    http://www.gnu.org/software/autoconf-archive/ax_require_defined.html
+#    https://www.gnu.org/software/autoconf-archive/ax_require_defined.html
 # ===========================================================================
 #
 # SYNOPSIS
@@ -30,7 +30,7 @@
 #   and this notice are preserved. This file is offered as-is, without any
 #   warranty.
 
-#serial 1
+#serial 2
 
 AC_DEFUN([AX_REQUIRE_DEFINED], [dnl
   m4_ifndef([$1], [m4_fatal([macro ]$1[ is not defined; is a m4 file missing?])])
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