kumquat-buildroot/package/udftools/0002-configure.ac-detect-readline-via-pkg-config-when-pos.patch

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From bdacf0101fea1dad2c89996b27cb4b9caee9109c Mon Sep 17 00:00:00 2001
From: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Date: Sun, 22 Apr 2018 22:28:09 +0200
Subject: [PATCH] configure.ac: detect readline via pkg-config when possible
pkg-config automatically handles static linking situations, where for
example readline is linked against ncurses, and therefore -lncurses
needs to be passed in addition to -lreadline.
This proposal uses pkg-config when available. If pkg-config is not
found, or readline is not found via pkg-config, we fallback to the
existing AC_CHECK_LIB(). This AC_CHECK_LIB() test is modified to set
READLINE_LIBS, like PKG_CHECK_MODULES() does. The Makefile.am
consequently uses READLINE_LIBS instead of hardcoding -lreadline.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
---
configure.ac | 14 ++++++++++++--
wrudf/Makefile.am | 2 +-
2 files changed, 13 insertions(+), 3 deletions(-)
diff --git a/configure.ac b/configure.ac
index 95fbba3..62b1caa 100644
--- a/configure.ac
+++ b/configure.ac
@@ -9,8 +9,18 @@ AC_PROG_CC
AC_DISABLE_SHARED
AM_PROG_LIBTOOL
-dnl Checks for libraries.
-AC_CHECK_LIB(readline, readline, [ ], AC_MSG_ERROR([cannot find -lreadline.]))
+PKG_PROG_PKG_CONFIG
+
+dnl Checks for libraries, by using pkg-config when available
+if test -n "${PKG_CONFIG}" ; then
+ PKG_CHECK_MODULES([READLINE], [readline], [readline_found=yes], [readline_found=no])
+fi
+
+if test "${readline_found}" != "yes" ; then
+ AC_CHECK_LIB(readline, readline,
+ [AC_SUBST([READLINE_LIBS], [-lreadline])],
+ AC_MSG_ERROR([cannot find -lreadline.]))
+fi
dnl Checks for header files.
AC_HEADER_STDC
diff --git a/wrudf/Makefile.am b/wrudf/Makefile.am
index fe1c269..e3ab85b 100644
--- a/wrudf/Makefile.am
+++ b/wrudf/Makefile.am
@@ -1,5 +1,5 @@
bin_PROGRAMS = wrudf
-wrudf_LDADD = $(top_builddir)/libudffs/libudffs.la -lreadline
+wrudf_LDADD = $(top_builddir)/libudffs/libudffs.la $(READLINE_LIBS)
wrudf_SOURCES = wrudf.c wrudf-cmnd.c wrudf-desc.c wrudf-cdrw.c wrudf-cdr.c ide-pc.c wrudf.h ide-pc.h ../include/ecma_167.h ../include/osta_udf.h ../include/bswap.h
AM_CPPFLAGS = -I$(top_srcdir)/include -D_GNU_SOURCE -DDEBUG
--
2.14.3