Changes to m4/ax_check_brotlilib.m4. All files

m4/ax_check_brotlilib.m4

new file mode 100644@@ -0,0 +1,138 @@+# SYNOPSIS+#+#   AX_CHECK_BROTLILIB([action-if-found], [action-if-not-found])+#+# DESCRIPTION+#+#   This macro searches for an installed brotli library. If nothing was+#   specified when calling configure, it searches first in /usr/local and+#   then in /usr, /opt/local and /sw. If the --with-brotli=DIR is specified,+#   it will try to find it in DIR/include/brotli/decode.h and+#   DIR/lib/libbrotlidec. If --without-brotli is specified, the library is+#   not searched at all.+#+#   If either the header file (brotli/decode.h) or the library (libbrotlidec)+#   is not found, shell commands 'action-if-not-found' is run. If+#   'action-if-not-found' is not specified, the configuration exits on error,+#   asking for a valid brotli library installation directory or+#   --without-brotli.+#+#   If both header file and library are found, shell commands+#   'action-if-found' is run. If 'action-if-found' is not specified, the+#   default action appends '-I${BROTLI_HOME}/include' to CPFLAGS, appends+#   '-L${BROTLI_HOME}/lib' to LDFLAGS, prepends '-lbrotlidec' and+#   '-lbrotlienc' to LIBS, and calls AC_DEFINE(HAVE_LIBBROTLI). You should use+#   autoheader to include a definition for this symbol in a config.h file.+#   Sample usage in a C/C++ source is as follows:+#+#     #ifdef HAVE_LIBBROTLI+#     #include <brotli/decode.h>+#     #include <brotli/encode.h>+#     #endif /* HAVE_LIBBROTLI */+#+# LICENSE+#+#   Copyright (c) 2023 Robert van Engelen <engelen@acm.org>+#+#   This program is free software; you can redistribute it and/or modify it+#   under the terms of the GNU General Public License as published by the+#   Free Software Foundation; either version 2 of the License, or (at your+#   option) any later version.+#+#   This program is distributed in the hope that it will be useful, but+#   WITHOUT ANY WARRANTY; without even the implied warranty of+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General+#   Public License for more details.+#+#   You should have received a copy of the GNU General Public License along+#   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+#   scripts that are the output of Autoconf when processing the Macro. You+#   need not follow the terms of the GNU General Public License when using+#   or distributing such scripts, even though portions of the text of the+#   Macro appear in them. The GNU General Public License (GPL) does govern+#   all other use of the material that constitutes the Autoconf Macro.+#+#   This special exception to the GPL applies to versions of the Autoconf+#   Macro released by the Autoconf Archive. When you make and distribute a+#   modified version of the Autoconf Macro, you may extend this special+#   exception to the GPL to apply to your modified version as well.++#serial 1++AC_DEFUN([AX_CHECK_BROTLILIB],+#+# Handle user hints+#+[AC_MSG_CHECKING(if brotli is wanted)+brotli_places="/usr/local /usr /opt/homebrew /opt/local /sw"+AC_ARG_WITH([brotli],+[  --with-brotli=DIR       root directory path of brotli library installation+                          @<:@defaults to /usr/local or /usr if not found in+                          /usr/local@:>@+  --without-brotli        to disable brotli library usage completely],+[if test "$withval" != "no" ; then+  AC_MSG_RESULT(yes)+  if test -d "$withval"+  then+    brotli_places="$withval $brotli_places"+  else+    AC_MSG_WARN([Sorry, $withval does not exist, checking usual places])+  fi+else+  brotli_places=""+  AC_MSG_RESULT(no)+fi],+[AC_MSG_RESULT(yes)])+#+# Locate brotli, if wanted+#+if test -n "${brotli_places}"+then+  # check the user supplied or any other more or less 'standard' place:+  #   Most UNIX systems      : /usr/local and /usr+  #   MacPorts / Fink on OSX : /opt/local respectively /sw+  for BROTLI_HOME in ${brotli_places} ; do+    if test -f "${BROTLI_HOME}/include/brotli/decode.h"; then break; fi+    BROTLI_HOME=""+  done++  BROTLI_OLD_LDFLAGS=$LDFLAGS+  BROTLI_OLD_CPPFLAGS=$CPPFLAGS+  if test -n "${BROTLI_HOME}"; then+    LDFLAGS="$LDFLAGS -L${BROTLI_HOME}/lib"+    CPPFLAGS="$CPPFLAGS -I${BROTLI_HOME}/include"+  fi+  AC_LANG_PUSH([C])+  AC_CHECK_LIB([brotlidec], [BrotliDecoderCreateInstance], [brotli_cv_libbrotli=yes], [brotli_cv_libbrotli=no])+  AC_CHECK_HEADER([brotli/decode.h], [brotli_cv_brotli_h=yes], [brotli_cv_brotli_h=no])+  AC_LANG_POP([C])+  if test "$brotli_cv_libbrotli" = "yes" && test "$brotli_cv_brotli_h" = "yes"+  then+    #+    # If both library and header were found, action-if-found+    #+    m4_ifblank([$1],[+                CPPFLAGS="$CPPFLAGS -I${BROTLI_HOME}/include"+                LDFLAGS="$LDFLAGS -L${BROTLI_HOME}/lib"+                LIBS="-lbrotlidec -lbrotlienc $LIBS"+                AC_DEFINE([HAVE_LIBBROTLI], [1],+                          [Define to 1 if you have `brotli' library (-lbrotlidec -lbrotlienc)])+               ],[+                # Restore variables+                LDFLAGS="$BROTLI_OLD_LDFLAGS"+                CPPFLAGS="$BROTLI_OLD_CPPFLAGS"+                $1+               ])+  else+    #+    # If either header or library was not found, action-if-not-found+    #+    m4_default([$2],[+                AC_MSG_ERROR([either specify a valid brotli library installation with --with-brotli=DIR or disable brotli usage with --without-brotli])+                ])+  fi+fi+])