[oe] [meta-oe][dizzy][PATCH] ptpd: disable libpcap detection via pcap-config

[Stefan Agner]

When the host system provides pcap-config, the configure scripts
detect that and add a bogous CPPFLAG:

checking for pcap-config... /usr/bin/pcap-config
checking if we want to build with libpcap support... yes, pcap-config
...
PCAP_CPPFLAGS =  -I/usr/include

Which down the line can lead to compile errors due to wrong headers
being included. Fix this issue by using --with-pcap-config=no which
prevents detection using pcap-config but does "guessing", which works
fine for OE.

Signed-off-by: Stefan Agner <stefan at agner.ch>
---
If the host has libpcap development packages installed (which provide
pcap-config), this lead to compile errors like:
cc1: warning: include location "/usr/include" is unsafe for cross-compilation
[-Wpoison-system-directories]
cc1: warning: include location "/usr/include" is unsafe for cross-compilation
[-Wpoison-system-directories]
cc1: warning: include location "/usr/include" is unsafe for cross-compilation
[-Wpoison-system-directories]
In file included from /usr/include/bits/byteswap.h:35:0,
                 from /usr/include/endian.h:60,
                 from /usr/include/bits/waitstatus.h:64,
                 from /usr/include/stdlib.h:42,
                 from
/home/cceylan01/mywork/pdu/toradex/oe-core/build/out-glibc/work/armv7at2hf-vfp-neon-angstrom-linux-gnueabi/ptpd/2.3.1-rc2-r0/ptpd-2.3.1-rc2/src/ptpd.h:40,
                 from
/home/cceylan01/mywork/pdu/toradex/oe-core/build/out-glibc/work/armv7at2hf-vfp-neon-angstrom-linux-gnueabi/ptpd/2.3.1-rc2-r0/ptpd-2.3.1-rc2/src/bmc.c:54:
/home/cceylan01/mywork/pdu/toradex/oe-core/build/out-glibc/work/armv7at2hf-vfp-neon-angstrom-linux-gnueabi/ptpd/2.3.1-rc2-r0/ptpd-2.3.1-rc2/src/bmc.c:
In function 'initData':
/usr/include/bits/byteswap-16.h:31:5: error: invalid 'asm': invalid operand for
code 'w'
     __asm__ ("rorw $8, %w0"           \
     ^
/usr/include/netinet/in.h:403:21: note: in expansion of macro '__bswap_16'
 #   define htons(x) __bswap_16 (x)

This problem is already solved in fido/master due to the change to
pkgconfig by Joe MacDonald...

 meta-networking/recipes-daemons/ptpd/ptpd_2.3.1-rc2.bb | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/meta-networking/recipes-daemons/ptpd/ptpd_2.3.1-rc2.bb b/meta-networking/recipes-daemons/ptpd/ptpd_2.3.1-rc2.bb
index db74e44..b6abfee 100644
--- a/meta-networking/recipes-daemons/ptpd/ptpd_2.3.1-rc2.bb
+++ b/meta-networking/recipes-daemons/ptpd/ptpd_2.3.1-rc2.bb
@@ -8,7 +8,7 @@ SECTION = "network"
 LICENSE = "BSD"
 LIC_FILES_CHKSUM = "file://README;md5=2452033fe374283f29579898663b1aa8"
 
-DEPENDS = "libpcap"
+DEPENDS = "linux-libc-headers libpcap"
 
 inherit autotools
 
@@ -30,7 +30,7 @@ S = "${WORKDIR}/ptpd-${PV}"
 
 EXTRA_OEMAKE = ""
 
-EXTRA_OECONF += "--disable-snmp"
+EXTRA_OECONF += "--disable-snmp --with-pcap-config=no"
 
 do_install() {
     install -d ${D}${bindir} ${D}${mandir}/man8
-- 
2.4.1