configure.in: use pkg-config for libpcap detection
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The detection of libpcap was based in ${prefix}, which doesn't make
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sense in a cross-compilation context and can cause host leakage into
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the target build.
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So instead, let's use pkg-config to detect libpcap, since it is anyway
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already use in this configure.in to detect libglib.
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Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
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Index: b/configure.in
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===================================================================
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--- a/configure.in
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+++ b/configure.in
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@@ -75,25 +75,13 @@
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fi
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;;
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esac ],
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-[ if test -f ${prefix}/include/pcap.h; then
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- PCAP_CFLAGS="-I${prefix}/include"
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- PCAPLIB="-L${exec_prefix}/lib -lpcap"
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- elif test -f /usr/include/pcap/pcap.h; then
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- PCAP_CFLAGS="-I/usr/include/pcap"
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- PCAPLIB="-lpcap"
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- else
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- TMP=$LIBS
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- LIBS="-lpcap $LIBS"
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- AC_TRY_LINK([#include <pcap.h>], pcap_open_offline("",""),
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- LIBPCAP_FOUND=1,LIBPCAP_FOUND=0)
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- LIBS=$TMP
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- if test $LIBPCAP_FOUND = 1 ; then
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- PCAPLIB="-lpcap"
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- else
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- AC_ERROR(libpcap not found)
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- fi
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- fi
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- AC_MSG_RESULT(yes) ]
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+[
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+ PKG_PROG_PKG_CONFIG
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+ PKG_CHECK_MODULES(LIBPCAP, libpcap)
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+ AC_MSG_RESULT(yes)
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+ PCAP_CFLAGS=${LIBPCAP_CFLAGS}
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+ PCAPLIB=${LIBPCAP_LIBS}
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+]
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)
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AC_SUBST(PCAP_CFLAGS)
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AC_SUBST(PCAPLIB)
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