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From 1b896582a0cd74854f99e08854554807a8f1f764 Mon Sep 17 00:00:00 2001
From: Mike Frysinger <vapier@gentoo.org>
Date: Tue, 22 May 2012 14:12:23 -0400
Subject: [PATCH] link against -ldl when -lltdl is not available
If ltdl isn't found, the code will use dlopen if it's available.
But it won't link to -ldl which can cause link errors like so:
CCLD opensc-tool
../../src/libopensc/.libs/libopensc.so: error: undefined reference to 'dlopen'
../../src/libopensc/.libs/libopensc.so: error: undefined reference to 'dlsym'
../../src/libopensc/.libs/libopensc.so: error: undefined reference to 'dlerror'
../../src/libopensc/.libs/libopensc.so: error: undefined reference to 'dlclose'
collect2: ld returned 1 exit status
make[3]: *** [opensc-tool] Error 1
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
---
configure.ac | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/configure.ac b/configure.ac
index 2751f0f..123aeb1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -277,6 +277,13 @@ if test -z "${LTLIB_LIBS}"; then
[LTLIB_LIBS="-lltdl"]
)
fi
+if test -z "${LTLIB_LIBS}"; then
+ AC_CHECK_LIB(
+ [dl],
+ [dlopen],
+ [LTLIB_LIBS="-ldl"]
+ )
+fi
saved_CFLAGS="${CFLAGS}"
CFLAGS="${CFLAGS} ${LTLIB_CFLAGS}"
--
1.7.8.6
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