e2c756fc Merge branch 'upstream-kwsys' into update-kwsys
4ba0ac7b KWSys 2013-01-14 (6fa1c99f)
6f57a904 Merge branch 'upstream-kwsys' into update-kwsys
6318834b KWSys 2013-01-10 (608d6b47)

2bee6f5b Add the TARGET_DEFINED generator expression

7c7b94f2 Document the use of generator expressions in new commands.

1da75022 Don't include generator expressions in old-style link handling.

7171fd0a Add a way to check INTERFACE user property compatibility.

8ff1d471 CMake: Skip empty link.txt lines (#13845)

Extract upstream KWSys using the following shell commands.

$ git archive --prefix=upstream-kwsys/ 6fa1c99f | tar x
$ git shortlog --no-merges --abbrev=8 --format='%h %s' 608d6b47..6fa1c99f
Brad King (1):
      84827cc1 Process: Avoid argv[0]==NULL from parsing empty command line

Rolf Eike Beer (8):
      e041cd66 SystemInformation: factor out QueryMemoryBySysconf()
      ea850fa0 SystemInformation: factor out QueryProcessorBySysconf()
      57f06d49 SystemInformation: count processors with sysconf() on Solaris
      c6057a06 SystemInformation: fix "Multi-character character constant"
      5a27bd4f SystemInformation: make IsHyperThreadingSupported() return bool
      342c0ad2 SystemInformation: query memory size with sysconf() on Solaris
      f0b857c1 SystemInformation: cache result of IsHyperThreadingSupported()
      ab0c2a09 SystemInformation: try using assembler with BorlandC

Change-Id: I072371ed35eed892a5ef62a9e9e6cad734e961d9

This tests whether the parameter is a usable target.

Don't add generator expressions to variables which are used
for CMP0003, CMP0004, and the old-style _LIB_DEPENDS content. They
will not be evaluated when read anyway and would probably confuse
the code reading them.

This makes it legitimate to use target_link_libraries with generator
expressions as arguments.

Extract upstream KWSys using the following shell commands.

$ git archive --prefix=upstream-kwsys/ 608d6b47 | tar x
$ git shortlog --no-merges --abbrev=8 --format='%h %s' fc60c8b8..608d6b47
Rolf Eike Beer (6):
      297758a5 SystemInformation: fix conversion warning
      79ef34ef SystemInformation: fix calling kwsysProcess_WaitForData()
      f1068caf SystemInformation: speed up copying process data
      7dfc27d5 SystemInformation: check CPU vendor and SSE support on OpenBSD
      494d9d7a SystemInformation: get stepping code on Intel Macs
      608d6b47 SystemInformation: determine processor features on Intel Macs

Change-Id: I7f5bc5b7af2bf7d4e5c1ee291c286add0f17a7d5

77d26467 Allow generator expressions in LINK_INTERFACE_LIBRARIES.
94aeaf72 Split LINK_INTERFACE_LIBRARIES export handling into dedicated method.
a3aedb81 Split the generator expression before extracting targets.
b6036d10 Extract the AddTargetNamespace method.
cb1afbf4 Don't pass a position when determining if a target name is a literal.
f99196dc Add cmGeneratorExpression::Split() API.

93034a83 Fix linking to imported libraries test.

In the implementation of "cmake -E cmake_link_script", skip lines from
the input file that are empty or contain only whitespace.  Do not try to
run a child with no command line.

The Config and IMPORTED_ variants may also contain generator
expressions.

If 'the implementation is the interface', then the result of
evaluating the expressions at generate time is used to populate
the IMPORTED_LINK_INTERFACE_LIBRARIES property.

1) In the case of non-static libraries, this is fine because the
  user still has the option to populate the LINK_INTERFACE_LIBRARIES
  with generator expressions if that is what is wanted.

2) In the case of static libraries, this prevents a footgun,
  enforcing that the interface and the implementation are really
  the same.

  Otherwise, the LINK_LIBRARIES could contain a generator
  expression which is evaluated with a different context at build
  time, and when used as an imported target. That would mean that the
  result of evaluating the INTERFACE_LINK_LIBRARIES property for
  a static library would not necessarily be the 'link implementation'.

  For example:

    add_library(libone STATIC libone.cpp)
    add_library(libtwo STATIC libtwo.cpp)
    add_library(libthree STATIC libthree.cpp)

    target_link_libraries(libtwo
      $<$<STREQUAL:$<TARGET_PROPERTY:TYPE>,STATIC_LIBRARY>:libone>)
    target_link_libraries(libthree libtwo)

  If the LINK_LIBRARIES content was simply copied to the
  IMPORTED_LINK_INTERFACE_LIBRARIES, then libthree links to libone, but
  executables linking to libthree will not link to libone.

3) As the 'implementation is the interface' concept is to be
  deprecated in the future anyway, this should be fine.

Now that we're processing a LINK_INTERFACE_LIBRARIES string, it
can contain targets. Make sure they are extracted for
namespacing purposes.

This needs to be restricted to strings which can actually have
targets named in them. For example, this is not done for
INTERFACE_COMPILE_DEFINITIONS, because even if there is a target
named 'foo', the string 'foo' in that property means that '-Dfoo'
will be set when compiling.

The lastPos refers to a position in a different string.

It can split a string like

 "A;$<1:B>;$<1:C>;D;E;$<1:F;G;H>;$<1:I>;J"

into

 "A" "$<1:B>" "$<1:C>" "D" "E" "$<1:F;G;H>" "$<1:I>" "J"

Make a C executable instead of attempting to make a C++ static
library (and not really succeeding). This was introduced in
commit 894f52f3 (Handle INTERFACE properties transitively for
includes and defines., 2012-09-23).

3581b96c Process the INTERFACE_PIC property from linked dependencies
042ecf04 Add API to calculate link-interface-dependent bool properties or error.
bf5ece51 Keep track of properties used to determine linker libraries.

fc61a7a7 Add the target_compile_definitions command.
8a37ebec Add the target_include_directories command.

c8ee07d0 FindQt4: Add INTERFACE includes and defines to Qt4 targets

c7728106 Add the -Wundef flag when compiling CMake.

9cfe4f1b Allow target_link_libraries with IMPORTED targets.

0380f36c FindOpenGL: add Haiku paths
8e9630c7 FindGLUT: BeOS does not have libXi and libXmu
50bfedf3 FindLua51: do not try to link libm on BeOS
3d2e6a06 check for Haiku only with __HAIKU__
7a1b961d Haiku no longer defines __BEOS__
ed96d9a6 bootstrap: use better defaults for Haiku

32fb667a Merge branch 'upstream-kwiml' into update-KWIML
9fdfe074 KWIML: Teach ABI about 'long long' on older GNU

This allows a dependee to inform a target that it should have its
POSITION_INDEPENDENT_CODE property set to ON, or OFF. The value of
the POSITION_INDEPENDENT_CODE property, if set, must be consistent
with any INTERFACE_POSITION_INDEPENDENT_CODE properties on dependees.

Add a test covering the consistency checks on platforms where they run.

This is a convenience API to populate the corresponding properties.

This is a convenience API to populate the corresponding properties.