From: Ulya Trofimovich <skvadrik@gmail.com>
Date: Wed, 20 Feb 2019 17:29:03 +0000 (+0000)
Subject: libre2c (benchmark): do not try to link with re2 if it's not available.
X-Git-Tag: 1.2~140
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=5a59e5e33a6e5db14d7edeb283007a5d6c60e207;p=re2c

libre2c (benchmark): do not try to link with re2 if it's not available.
---

diff --git a/re2c/Makefile.lib.am b/re2c/Makefile.lib.am
index c81170ae..37e942eb 100644
--- a/re2c/Makefile.lib.am
+++ b/re2c/Makefile.lib.am
@@ -180,7 +180,7 @@ check_PROGRAMS += test_libre2c
 
 bench_libre2c_SOURCES = lib/bench.cc
 bench_libre2c_CXXFLAGS = $(AM_CXXFLAGS) -std=c++11
-bench_libre2c_LDFLAGS = -lre2
+bench_libre2c_LDFLAGS = $(LDFLAGS_RE2)
 bench_libre2c_LDADD = libre2c.la
 check_PROGRAMS += bench_libre2c
 
diff --git a/re2c/configure.ac b/re2c/configure.ac
index 11db3a90..3cb2b808 100644
--- a/re2c/configure.ac
+++ b/re2c/configure.ac
@@ -35,8 +35,9 @@ AM_COND_IF([REBUILD_DOCS], [
 AC_ARG_ENABLE([libs], [AS_HELP_STRING([--enable-libs], [build libraries])])
 AM_CONDITIONAL([WITH_LIBS], [test "x$enable_libs" = "xyes"])
 AM_COND_IF([WITH_LIBS], [
+    AC_SUBST(LDFLAGS_RE2, [])
     AC_LANG_PUSH([C++])
-    AC_CHECK_HEADERS([re2/re2.h], [], [], [[]])
+    AC_CHECK_HEADERS([re2/re2.h], [AS_VAR_SET([LDFLAGS_RE2], ["-lre2"])], [], [[]])
     AC_LANG_POP([C++])
 ])