Suricata

I just got an err building suricata on PPA on i386 Precise -
https://launchpadlibrarian.net/125935561/buildlog_ubuntu-precise-i386.suricata_1.4-4ubuntu4_FAILEDTOBUILD.txt.gz :

make[1]: Leaving directory `/build/buildd/suricata-1.4'
dh_auto_build
make[1]: Entering directory `/build/buildd/suricata-1.4'
make  all-recursive
make[2]: Entering directory `/build/buildd/suricata-1.4'
Making all in src
make[3]: Entering directory `/build/buildd/suricata-1.4/src'
make  all-am
make[4]: Entering directory `/build/buildd/suricata-1.4/src'
gcc -DHAVE_CONFIG_H -I. -I..    -D_FORTIFY_SOURCE=2 -I/usr/include/nspr -I/usr/include/nss/ -DLOCAL_STATE_DIR=\"/var\" -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Wformat-security -DRELEASE -Wextra -Werror-implicit-function-declaration -fno-tree-pre -Wall -fno-strict-aliasing -Wno-unused-parameter -std=gnu99 -DNFQ -DHAVE_LIBNET11 -D_BSD_SOURCE -D__BSD_SOURCE -D__FAVOR_BSD -DHAVE_NET_ETHERNET_H  -I/usr/include -DLIBPCAP_VERSION_MAJOR=1 -DHAVE_PCAP_SET_BUFF -DHAVE_LIBCAP_NG -c alert-debuglog.c
gcc -DHAVE_CONFIG_H -I. -I..    -D_FORTIFY_SOURCE=2 -I/usr/include/nspr -I/usr/include/nss/ -DLOCAL_STATE_DIR=\"/var\" -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Wformat-security -DRELEASE -Wextra -Werror-implicit-function-declaration -fno-tree-pre -Wall -fno-strict-aliasing -Wno-unused-parameter -std=gnu99 -DNFQ -DHAVE_LIBNET11 -D_BSD_SOURCE -D__BSD_SOURCE -D__FAVOR_BSD -DHAVE_NET_ETHERNET_H  -I/usr/include -DLIBPCAP_VERSION_MAJOR=1 -DHAVE_PCAP_SET_BUFF -DHAVE_LIBCAP_NG -c alert-fastlog.c
gcc -DHAVE_CONFIG_H -I. -I..    -D_FORTIFY_SOURCE=2 -I/usr/include/nspr -I/usr/include/nss/ -DLOCAL_STATE_DIR=\"/var\" -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Wformat-security -DRELEASE -Wextra -Werror-implicit-function-declaration -fno-tree-pre -Wall -fno-strict-aliasing -Wno-unused-parameter -std=gnu99 -DNFQ -DHAVE_LIBNET11 -D_BSD_SOURCE -D__BSD_SOURCE -D__FAVOR_BSD -DHAVE_NET_ETHERNET_H  -I/usr/include -DLIBPCAP_VERSION_MAJOR=1 -DHAVE_PCAP_SET_BUFF -DHAVE_LIBCAP_NG -c alert-pcapinfo.c
gcc -DHAVE_CONFIG_H -I. -I..    -D_FORTIFY_SOURCE=2 -I/usr/include/nspr -I/usr/include/nss/ -DLOCAL_STATE_DIR=\"/var\" -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Wformat-security -DRELEASE -Wextra -Werror-implicit-function-declaration -fno-tree-pre -Wall -fno-strict-aliasing -Wno-unused-parameter -std=gnu99 -DNFQ -DHAVE_LIBNET11 -D_BSD_SOURCE -D__BSD_SOURCE -D__FAVOR_BSD -DHAVE_NET_ETHERNET_H  -I/usr/include -DLIBPCAP_VERSION_MAJOR=1 -DHAVE_PCAP_SET_BUFF -DHAVE_LIBCAP_NG -c alert-prelude.c
gcc -DHAVE_CONFIG_H -I. -I..    -D_FORTIFY_SOURCE=2 -I/usr/include/nspr -I/usr/include/nss/ -DLOCAL_STATE_DIR=\"/var\" -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Wformat-security -DRELEASE -Wextra -Werror-implicit-function-declaration -fno-tree-pre -Wall -fno-strict-aliasing -Wno-unused-parameter -std=gnu99 -DNFQ -DHAVE_LIBNET11 -D_BSD_SOURCE -D__BSD_SOURCE -D__FAVOR_BSD -DHAVE_NET_ETHERNET_H  -I/usr/include -DLIBPCAP_VERSION_MAJOR=1 -DHAVE_PCAP_SET_BUFF -DHAVE_LIBCAP_NG -c alert-syslog.c
gcc -DHAVE_CONFIG_H -I. -I..    -D_FORTIFY_SOURCE=2 -I/usr/include/nspr -I/usr/include/nss/ -DLOCAL_STATE_DIR=\"/var\" -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Wformat-security -DRELEASE -Wextra -Werror-implicit-function-declaration -fno-tree-pre -Wall -fno-strict-aliasing -Wno-unused-parameter -std=gnu99 -DNFQ -DHAVE_LIBNET11 -D_BSD_SOURCE -D__BSD_SOURCE -D__FAVOR_BSD -DHAVE_NET_ETHERNET_H  -I/usr/include -DLIBPCAP_VERSION_MAJOR=1 -DHAVE_PCAP_SET_BUFF -DHAVE_LIBCAP_NG -c alert-unified2-alert.c
gcc -DHAVE_CONFIG_H -I. -I..    -D_FORTIFY_SOURCE=2 -I/usr/include/nspr -I/usr/include/nss/ -DLOCAL_STATE_DIR=\"/var\" -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Wformat-security -DRELEASE -Wextra -Werror-implicit-function-declaration -fno-tree-pre -Wall -fno-strict-aliasing -Wno-unused-parameter -std=gnu99 -DNFQ -DHAVE_LIBNET11 -D_BSD_SOURCE -D__BSD_SOURCE -D__FAVOR_BSD -DHAVE_NET_ETHERNET_H  -I/usr/include -DLIBPCAP_VERSION_MAJOR=1 -DHAVE_PCAP_SET_BUFF -DHAVE_LIBCAP_NG -c app-layer.c
gcc -DHAVE_CONFIG_H -I. -I..    -D_FORTIFY_SOURCE=2 -I/usr/include/nspr -I/usr/include/nss/ -DLOCAL_STATE_DIR=\"/var\" -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Wformat-security -DRELEASE -Wextra -Werror-implicit-function-declaration -fno-tree-pre -Wall -fno-strict-aliasing -Wno-unused-parameter -std=gnu99 -DNFQ -DHAVE_LIBNET11 -D_BSD_SOURCE -D__BSD_SOURCE -D__FAVOR_BSD -DHAVE_NET_ETHERNET_H  -I/usr/include -DLIBPCAP_VERSION_MAJOR=1 -DHAVE_PCAP_SET_BUFF -DHAVE_LIBCAP_NG -c app-layer-dcerpc.c
gcc -DHAVE_CONFIG_H -I. -I..    -D_FORTIFY_SOURCE=2 -I/usr/include/nspr -I/usr/include/nss/ -DLOCAL_STATE_DIR=\"/var\" -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Wformat-security -DRELEASE -Wextra -Werror-implicit-function-declaration -fno-tree-pre -Wall -fno-strict-aliasing -Wno-unused-parameter -std=gnu99 -DNFQ -DHAVE_LIBNET11 -D_BSD_SOURCE -D__BSD_SOURCE -D__FAVOR_BSD -DHAVE_NET_ETHERNET_H  -I/usr/include -DLIBPCAP_VERSION_MAJOR=1 -DHAVE_PCAP_SET_BUFF -DHAVE_LIBCAP_NG -c app-layer-dcerpc-udp.c
gcc -DHAVE_CONFIG_H -I. -I..    -D_FORTIFY_SOURCE=2 -I/usr/include/nspr -I/usr/include/nss/ -DLOCAL_STATE_DIR=\"/var\" -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Wformat-security -DRELEASE -Wextra -Werror-implicit-function-declaration -fno-tree-pre -Wall -fno-strict-aliasing -Wno-unused-parameter -std=gnu99 -DNFQ -DHAVE_LIBNET11 -D_BSD_SOURCE -D__BSD_SOURCE -D__FAVOR_BSD -DHAVE_NET_ETHERNET_H  -I/usr/include -DLIBPCAP_VERSION_MAJOR=1 -DHAVE_PCAP_SET_BUFF -DHAVE_LIBCAP_NG -c app-layer-detect-proto.c
gcc -DHAVE_CONFIG_H -I. -I..    -D_FORTIFY_SOURCE=2 -I/usr/include/nspr -I/usr/include/nss/ -DLOCAL_STATE_DIR=\"/var\" -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Wformat-security -DRELEASE -Wextra -Werror-implicit-function-declaration -fno-tree-pre -Wall -fno-strict-aliasing -Wno-unused-parameter -std=gnu99 -DNFQ -DHAVE_LIBNET11 -D_BSD_SOURCE -D__BSD_SOURCE -D__FAVOR_BSD -DHAVE_NET_ETHERNET_H  -I/usr/include -DLIBPCAP_VERSION_MAJOR=1 -DHAVE_PCAP_SET_BUFF -DHAVE_LIBCAP_NG -c app-layer-ftp.c
gcc -DHAVE_CONFIG_H -I. -I..    -D_FORTIFY_SOURCE=2 -I/usr/include/nspr -I/usr/include/nss/ -DLOCAL_STATE_DIR=\"/var\" -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Wformat-security -DRELEASE -Wextra -Werror-implicit-function-declaration -fno-tree-pre -Wall -fno-strict-aliasing -Wno-unused-parameter -std=gnu99 -DNFQ -DHAVE_LIBNET11 -D_BSD_SOURCE -D__BSD_SOURCE -D__FAVOR_BSD -DHAVE_NET_ETHERNET_H  -I/usr/include -DLIBPCAP_VERSION_MAJOR=1 -DHAVE_PCAP_SET_BUFF -DHAVE_LIBCAP_NG -c app-layer-htp-body.c
gcc -DHAVE_CONFIG_H -I. -I..    -D_FORTIFY_SOURCE=2 -I/usr/include/nspr -I/usr/include/nss/ -DLOCAL_STATE_DIR=\"/var\" -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Wformat-security -DRELEASE -Wextra -Werror-implicit-function-declaration -fno-tree-pre -Wall -fno-strict-aliasing -Wno-unused-parameter -std=gnu99 -DNFQ -DHAVE_LIBNET11 -D_BSD_SOURCE -D__BSD_SOURCE -D__FAVOR_BSD -DHAVE_NET_ETHERNET_H  -I/usr/include -DLIBPCAP_VERSION_MAJOR=1 -DHAVE_PCAP_SET_BUFF -DHAVE_LIBCAP_NG -c app-layer-htp.c
app-layer-htp.c: In function 'HTPConfigParseParameters':
app-layer-htp.c:2257:17: error: implicit declaration of function 'htp_config_set_path_decode_u_encoding' [-Werror=implicit-function-declaration]
cc1: some warnings being treated as errors
make[4]: *** [app-layer-htp.o] Error 1
make[4]: Leaving directory `/build/buildd/suricata-1.4/src'
make[3]: *** [all] Error 2
make[3]: Leaving directory `/build/buildd/suricata-1.4/src'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/build/buildd/suricata-1.4'
make[1]: *** [all] Error 2
make[1]: Leaving directory `/build/buildd/suricata-1.4'
dh_auto_build: make -j1 returned exit code 2
make: *** [build] Error 2
dpkg-buildpackage: error: debian/rules build gave error exit status 2
******************************************************************************
Build finished at 20121216-1601
FAILED [dpkg-buildpackage died]
*****************************************************************************

Official htp/htp.h was not containing the declaration of 'htp_config_set_path_decode_u_encoding' before 3.0. This result in a problem when compiling with an external libhtp lib with -Werror=implicit-function-declaration].
For the reference, in embedded htp version this has been fixed by Victor Julien in ef52ba8f dating from 2012-03-22 12:33:57 +0100.

So we need at least 0.3.0 for an external build. Is it safe to assume suricata will work with an 0.3.0 version ?

0.3.0 is not supported.

The htp_config_set_path_decode_u_encoding function is part of 0.2.11 which we distribute and also bundle. So the check should make sure it is present, so that ppl using older htp versions get an error in the configure stage.