GitLab

The warnings are enabled for now only when using GCC 4.2 or later.
It may be possible later to also enable them when building CMake
with clang.  Don't duplicate the compiler flags if already set.

Extract upstream KWSys using the following shell commands.

$ git archive --prefix=upstream-kwsys/ b7a97ac3 | tar x
$ git shortlog --no-merges --abbrev=8 --format='%h %s' bab53989..b7a97ac3
Brad King (3):
      f9db7eab SystemInformation: Fix helper definition order
      a1e83e42 SystemInformation: Expose helper functions only where needed
      b7a97ac3 SystemInformation: Drop unused LoadLines on OS X

Burlen Loring (1):
      6072e63b SystemInformation: support for resource limits

Sean McBride (2):
      a536d833 ProcessUNIX: Suppress warning about uninteresting return code
      00852081 SystemInformation: Fix sloppy use of sysctlbyname() API

Change-Id: Iae8af129a021435ef4e6daef255e312c99d7b773

Extract upstream KWSys using the following shell code.

$ sha1=bab53989d7c4027259bff837574f75003396d59f &&
git archive --prefix=KWSys-snapshot/ $sha1 |
tar x

$ git log 719638e2..bab53989 ^341043cf --no-merges --oneline --abbrev=8
bab53989 Tell Git to check tab-in-indent and no-lf-at-eof
8115bd1b SystemInformation: Pass extern "C" functions to sigaction
4f4dd224 SystemInformation: Fix unused assignment warnings
6b26d2fe SystemInformation: Use ifaddrs.h only where available
381923ed SystemInformation: Use si_code constants only where available
8f85338c SystemInformation: Use execinfo.h backtrace only where available
a8e98f98 SystemInformation: Use Windows API more portably
750b4b5c SystemInformation: Use long long or __int64 only where available
8d2cafcd SystemInformation: Fix UNIX system includes for FQDN
857bda17 SystemInformation: Report more information
63cbea35 Add and configure developer setup helper scripts
924466f5 SystemTools: Fix accidental bitwise instead of logical OR
2f423229 SystemTools: Remove unused environ declaration
a49c2417 Disable warnings about MS deprecation of C library
e3390720 CTestConfig: Submit to dedicated KWSys dashboard

Extract upstream KWSys using the following shell code.

$ sha1=719638e233b560afb0d9a0afdcf23469dc1827fe &&
git archive --prefix=KWSys-snapshot/ $sha1 |
tar x

removing arguments omitted in 9db31162

Ancient versions of CMake required else(), endif(), and similar block
termination commands to have arguments matching the command starting the
block.  This is no longer the preferred style.

Run the following shell code:

for c in else endif endforeach endfunction endmacro endwhile; do
    echo 's/\b'"$c"'\(\s*\)(.\+)/'"$c"'\1()/'
done >convert.sed &&
git ls-files -z -- bootstrap '*.cmake' '*.cmake.in' '*CMakeLists.txt' |
egrep -z -v '^(Utilities/cm|Source/kwsys/)' |
egrep -z -v 'Tests/CMakeTests/While-Endwhile-' |
xargs -0 sed -i -f convert.sed &&
rm convert.sed

Ancient CMake versions required upper-case commands.  Later command
names became case-insensitive.  Now the preferred style is lower-case.

Run the following shell code:

cmake --help-command-list |
grep -v "cmake version" |
while read c; do
    echo 's/\b'"$(echo $c | tr '[:lower:]' '[:upper:]')"'\(\s*\)(/'"$c"'\1(/g'
done >convert.sed &&
git ls-files -z -- bootstrap '*.cmake' '*.cmake.in' '*CMakeLists.txt' |
egrep -z -v '^(Utilities/cm|Source/kwsys/)' |
xargs -0 sed -i -f convert.sed &&
rm convert.sed

Our Git commit hooks disallow modification or addition of lines with
trailing whitespace.  Wipe out all remnants of trailing whitespace
everywhere except third-party code.

Run the following shell code:

git ls-files -z -- \
 bootstrap doxygen.config '*.readme' \
 '*.c' '*.cmake' '*.cpp' '*.cxx' \
 '*.el' '*.f' '*.f90' '*.h' '*.in' '*.in.l' '*.java' \
 '*.mm' '*.pike' '*.py' '*.txt' '*.vim' |
egrep -z -v '^(Utilities/cm|Source/(kwsys|CursesDialog/form)/)' |
egrep -z -v '^(Modules/CPack\..*\.in)' |
xargs -0 sed -i 's/ \+$//'

Update the requirement specified in the top-level CMakeLists.txt file.
Drop the special-case minimum required version of 2.8.0 because the new
minimum subsumes it.

Revert commit 6c611c6b (libarchive: Restore CMake 2.6.3 as minimum
version, 2012-01-05) since our requirement now subsumes libarchive's.

The orginal patch has been reworked in order to follow
CMake source tree layout habit.
Inspired-By: Igor Murzov <e-mail@date.by>

Move the CMake version number components out of "CMakeLists.txt" into
dedicated file "Source/CMakeVersion.cmake".  Set the TWEAK level to the
date explicitly.  Add a "Source/CMakeVersion.bash" script to update the
date, thus replacing KWSys DateStamp for CMake.  Teach the bootstrap
script to extract the version components from their new location.

Extract upstream libarchive using the following shell code.

url=https://libarchive.googlecode.com/svn/release/3.0
v=3.0.2
r=4051
paths="
  CMakeLists.txt
  COPYING
  CTestConfig.cmake
  build/cmake
  build/pkgconfig
  build/utils
  build/version
  libarchive/*.*
"
date=$(svn log -q -c$r $url |
       sed -n "/^r/ {s/[^|]*|[^|]*|//;p;}")
svn export -r$r $url libarchive-$v-r$r &&
mkdir libarchive-$v-r$r-reduced &&
(cd libarchive-$v-r$r && tar c $paths) |
(cd libarchive-$v-r$r-reduced && tar x)
echo "r$r date: $date"

CMake is in git, let's ignore this.

Re-enable the option to build libarchive within CMake now that we have
imported a new snapshot.  Force libarchive ENABLE_* cache options to the
values CMake needs.  Set ENABLE_OPENSSL based on CMAKE_USE_OPENSSL to
preserve the behavior introduced in commit ee55a4f7 (Use OpenSSL only if
CMAKE_USE_OPENSSL, 2011-02-08).

Extract upstream libarchive using the following shell code.

url=https://libarchive.googlecode.com/svn/trunk
v=3.0.1
r=3950
paths="
  CMakeLists.txt
  COPYING
  CTestConfig.cmake
  build/cmake
  build/pkgconfig
  build/utils
  build/version
  libarchive/*.*
"
date=$(svn log -q -c$r $url |
       sed -n "/^r/ {s/[^|]*|[^|]*|//;p;}")
svn export -r$r $url libarchive-$v-r$r &&
mkdir libarchive-$v-r$r-reduced &&
(cd libarchive-$v-r$r && tar c $paths) |
(cd libarchive-$v-r$r-reduced && tar x)
echo "r$r date: $date"

You cannot set a property on a target that's not there, and
these targets are not there when BUILD_TESTING is OFF.

Thanks to Sankhesh Jhaveri for the bug report.

Provides header files that use preprocessor tests to detect and provide
information about the compiler and its target architecture.  The headers
contain no configuration-time test results and thus may be installed
into an architecture-independent include directory.  This makes them
suitable for use in the public interface of any package.

Use the include directories reported by find_package(LibArchive).

CMake itself has no calls to cmake_minimum_required with VERSION < 2.6
so this cache variable does not appear at all.