tcpdump/build.sh
Francois-Xavier Le Bail 625657ada8 CI: Introduce and use TCPDUMP_CMAKE_TAINTED
The new environment variable provides means to declare all or some libpcap
cmake run of a specific environment (CI or a working copy) as tainted.
Add explicit conditions to exempt the cmake run that emit warnings
now and request the compiler to treat warnings as errors *iff* the cmake
run is not tainted. This way if a cmake run that is warning-free now
degrades later, CI will fail it.

The treat warnings as errors cmake option used is:
-Werror=dev
       Make developer warnings errors.

       Make  warnings  that  are  meant  for  the  author of the CMake-
       Lists.txt files errors. By default this will also turn on depre-
       cated warnings as errors.
2022-11-30 12:05:58 +01:00

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#!/bin/sh -e
# This script runs one build with setup environment variables: BUILD_LIBPCAP,
# REMOTE, CC, CMAKE, CRYPTO and SMB.
: "${BUILD_LIBPCAP:=no}"
: "${REMOTE:=no}"
: "${CC:=gcc}"
: "${CMAKE:=no}"
: "${CRYPTO:=no}"
: "${SMB:=no}"
: "${TCPDUMP_TAINTED:=no}"
: "${TCPDUMP_CMAKE_TAINTED:=no}"
: "${MAKE_BIN:=make}"
. ./build_common.sh
# Install directory prefix
if [ -z "$PREFIX" ]; then
PREFIX=`mktempdir tcpdump_build`
echo "PREFIX set to '$PREFIX'"
fi
TCPDUMP_BIN="$PREFIX/bin/tcpdump"
# For TESTrun
export TCPDUMP_BIN
print_cc_version
# The norm is to compile without any warnings, but tcpdump builds on some OSes
# are not warning-free for one or another reason. If you manage to fix one of
# these cases, please remember to remove respective exemption below to help any
# later warnings in the same matrix subset trigger an error.
case `cc_id`/`os_id` in
clang-*/SunOS-5.11)
# (Clang 9 on OpenIndiana, Clang 11 on OmniOS)
# tcpdump.c:2312:51: warning: this function declaration is not a prototype
# [-Wstrict-prototypes]
# tcpdump.c:2737:11: warning: this function declaration is not a prototype
# [-Wstrict-prototypes]
[ "`uname -o`" = illumos ] && TCPDUMP_TAINTED=yes
;;
esac
[ "$TCPDUMP_TAINTED" != yes ] && CFLAGS=`cc_werr_cflags`
# If necessary, set TCPDUMP_CMAKE_TAINTED here to exempt particular cmake from
# warnings. Use as specific terms as possible (e.g. some specific version and
# some specific OS).
[ "$TCPDUMP_CMAKE_TAINTED" != yes ] && CMAKE_OPTIONS='-Werror=dev'
if [ "$CMAKE" = no ]; then
if [ "$BUILD_LIBPCAP" = yes ]; then
echo "Using PKG_CONFIG_PATH=$PKG_CONFIG_PATH"
run_after_echo ./configure --with-crypto="$CRYPTO" \
--enable-smb="$SMB" --prefix="$PREFIX"
LD_LIBRARY_PATH="$PREFIX/lib"
export LD_LIBRARY_PATH
else
run_after_echo ./configure --with-crypto="$CRYPTO" \
--enable-smb="$SMB" --prefix="$PREFIX" --disable-local-libpcap
fi
else
# See libpcap build.sh for the rationale.
run_after_echo rm -rf CMakeFiles/ CMakeCache.txt build/
run_after_echo mkdir build
run_after_echo cd build
if [ "$BUILD_LIBPCAP" = yes ]; then
run_after_echo cmake "$CMAKE_OPTIONS" \
-DWITH_CRYPTO="$CRYPTO" -DENABLE_SMB="$SMB" \
${CFLAGS:+-DEXTRA_CFLAGS="$CFLAGS"} \
-DCMAKE_INSTALL_PREFIX="$PREFIX" -DCMAKE_PREFIX_PATH="$PREFIX" ..
LD_LIBRARY_PATH="$PREFIX/lib"
export LD_LIBRARY_PATH
else
run_after_echo cmake "$CMAKE_OPTIONS" \
-DWITH_CRYPTO="$CRYPTO" -DENABLE_SMB="$SMB" \
${CFLAGS:+-DEXTRA_CFLAGS="$CFLAGS"} \
-DCMAKE_INSTALL_PREFIX="$PREFIX" ..
fi
fi
run_after_echo "$MAKE_BIN" -s clean
if [ "$CMAKE" = no ]; then
run_after_echo "$MAKE_BIN" -s ${CFLAGS:+CFLAGS="$CFLAGS"}
else
# The "-s" flag is a no-op and CFLAGS is set using -DEXTRA_CFLAGS above.
run_after_echo "$MAKE_BIN"
fi
run_after_echo "$MAKE_BIN" install
print_so_deps "$TCPDUMP_BIN"
run_after_echo "$TCPDUMP_BIN" -h
# The "-D" flag depends on HAVE_PCAP_FINDALLDEVS and it would not be difficult
# to run the command below only if the macro is defined. That said, it seems
# more useful to run it anyway: every system that currently runs this script
# has pcap_findalldevs(), thus if the macro isn't defined, it means something
# went wrong in the build process (as was observed with GCC, CMake and the
# system libpcap on Solaris 11).
run_after_echo "$TCPDUMP_BIN" -D
if [ "$CIRRUS_CI" = true ]; then
# Likewise for the "-J" flag and HAVE_PCAP_SET_TSTAMP_TYPE.
run_after_echo sudo \
${LD_LIBRARY_PATH:+LD_LIBRARY_PATH="$LD_LIBRARY_PATH"} \
"$TCPDUMP_BIN" -J
run_after_echo sudo \
${LD_LIBRARY_PATH:+LD_LIBRARY_PATH="$LD_LIBRARY_PATH"} \
"$TCPDUMP_BIN" -L
fi
if [ "$BUILD_LIBPCAP" = yes ]; then
run_after_echo "$MAKE_BIN" check
fi
if [ "$CMAKE" = no ]; then
run_after_echo "$MAKE_BIN" releasetar
fi
if [ "$CIRRUS_CI" = true ]; then
run_after_echo sudo \
${LD_LIBRARY_PATH:+LD_LIBRARY_PATH="$LD_LIBRARY_PATH"} \
"$TCPDUMP_BIN" -#n -c 10
fi
handle_matrix_debug
if [ "$DELETE_PREFIX" = yes ]; then
run_after_echo rm -rf "$PREFIX"
fi
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