Pull from FB rev 63ce89e2f2301e6bba44a111cc7d4218022156f6

[folly.git] / folly / m4 / ax_boost_regex.m4

diff --git a/folly/m4/ax_boost_regex.m4 b/folly/m4/ax_boost_regex.m4
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+++ b/folly/m4/ax_boost_regex.m4
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+# ===========================================================================
+#      http://www.gnu.org/software/autoconf-archive/ax_boost_regex.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   AX_BOOST_REGEX
+#
+# DESCRIPTION
+#
+#   Test for Regex library from the Boost C++ libraries. The macro requires
+#   a preceding call to AX_BOOST_BASE. Further documentation is available at
+#   <http://randspringer.de/boost/index.html>.
+#
+#   This macro calls:
+#
+#     AC_SUBST(BOOST_REGEX_LIB)
+#
+#   And sets:
+#
+#     HAVE_BOOST_REGEX
+#
+# LICENSE
+#
+#   Copyright (c) 2008 Thomas Porschberg <thomas@randspringer.de>
+#   Copyright (c) 2008 Michael Tindal
+#
+#   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. This file is offered as-is, without any
+#   warranty.
+
+#serial 20
+
+AC_DEFUN([AX_BOOST_REGEX],
+[
+        AC_ARG_WITH([boost-regex],
+        AS_HELP_STRING([--with-boost-regex@<:@=special-lib@:>@],
+                   [use the Regex library from boost - it is possible to specify a certain library for the linker
+                        e.g. --with-boost-regex=boost_regex-gcc-mt-d-1_33_1 ]),
+        [
+        if test "$withval" = "no"; then
+                want_boost="no"
+        elif test "$withval" = "yes"; then
+            want_boost="yes"
+            ax_boost_user_regex_lib=""
+        else
+                    want_boost="yes"
+                        ax_boost_user_regex_lib="$withval"
+                                fi
+        ],
+        [want_boost="yes"]
+        )
+
+        if test "x$want_boost" = "xyes"; then
+        AC_REQUIRE([AC_PROG_CC])
+                CPPFLAGS_SAVED="$CPPFLAGS"
+                        CPPFLAGS="$CPPFLAGS $BOOST_CPPFLAGS"
+                                            export CPPFLAGS
+
+                                                   LDFLAGS_SAVED="$LDFLAGS"
+                                                        LDFLAGS="$LDFLAGS $BOOST_LDFLAGS"
+                                                                          export LDFLAGS
+
+        AC_CACHE_CHECK(whether the Boost::Regex library is available,
+                                                           ax_cv_boost_regex,
+        [AC_LANG_PUSH([C++])
+                         AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[@%:@include <boost/regex.hpp>
+                                                                                                                            ]],
+                                   [[boost::regex r(); return 0;]])],
+                   ax_cv_boost_regex=yes, ax_cv_boost_regex=no)
+         AC_LANG_POP([C++])
+                ])
+                        if test "x$ax_cv_boost_regex" = "xyes"; then
+                                AC_DEFINE(HAVE_BOOST_REGEX,,[define if the Boost::Regex library is available])
+            BOOSTLIBDIR=`echo $BOOST_LDFLAGS | sed -e 's/@<:@^\/@:>@*//'`
+            if test "x$ax_boost_user_regex_lib" = "x"; then
+                for libextension in `ls $BOOSTLIBDIR/libboost_regex*.so* $BOOSTLIBDIR/libboost_regex*.a* 2>/dev/null | sed 's,.*/,,' | sed -e 's;^lib\(boost_regex.*\)\.so.*$;\1;' -e 's;^lib\(boost_regex.*\)\.a*$;\1;'` ; do
+                     ax_lib=${libextension}
+                                            AC_CHECK_LIB($ax_lib, exit,
+                                 [BOOST_REGEX_LIB="-l$ax_lib"; AC_SUBST(BOOST_REGEX_LIB) link_regex="yes"; break],
+                                 [link_regex="no"])
+                                                        done
+                if test "x$link_regex" != "xyes"; then
+                for libextension in `ls $BOOSTLIBDIR/boost_regex*.{dll,a}* 2>/dev/null | sed 's,.*/,,' | sed -e 's;^\(boost_regex.*\)\.dll.*$;\1;' -e 's;^\(boost_regex.*\)\.a*$;\1;'` ; do
+                     ax_lib=${libextension}
+                                            AC_CHECK_LIB($ax_lib, exit,
+                                 [BOOST_REGEX_LIB="-l$ax_lib"; AC_SUBST(BOOST_REGEX_LIB) link_regex="yes"; break],
+                                 [link_regex="no"])
+                                                        done
+                fi
+
+            else
+               for ax_lib in $ax_boost_user_regex_lib boost_regex-$ax_boost_user_regex_lib; do
+                                   AC_CHECK_LIB($ax_lib, main,
+                                   [BOOST_REGEX_LIB="-l$ax_lib"; AC_SUBST(BOOST_REGEX_LIB) link_regex="yes"; break],
+                                   [link_regex="no"])
+               done
+            fi
+            if test "x$ax_lib" = "x"; then
+                AC_MSG_ERROR(Could not find a version of the Boost::Regex library!)
+            fi
+                        if test "x$link_regex" != "xyes"; then
+                                               AC_MSG_ERROR(Could not link against $ax_lib !)
+                                                                      fi
+                                                                        fi
+
+                                                                                CPPFLAGS="$CPPFLAGS_SAVED"
+                                                                                LDFLAGS="$LDFLAGS_SAVED"
+                                                                                fi
+])
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