Package: cmake
Version: 3.0.2-1
Severity: normal
When both -DCMAKE_C_COMPILER and -DCMAKE_CXX_COMPILER are set on cmake
invocation, the build goes fine if one just runs "make" afterwards.
If one re-runs cmake a second time, then the build cannot succeed:
yann@home:build$ rm -rf *
yann@home:build$ cmake .. -DCMAKE_C_COMPILER=clang-3.4
-DCMAKE_CXX_COMPILER=clang++-3.4
-- The CXX compiler identification is Clang 3.4.2
-- The C compiler identification is Clang 3.4.2
-- Check for working CXX compiler: /usr/bin/clang++-3.4
-- Check for working CXX compiler: /usr/bin/clang++-3.4 -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working C compiler: /usr/bin/clang-3.4
-- Check for working C compiler: /usr/bin/clang-3.4 -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Configuring done
-- Generating done
-- Build files have been written to: /work/yann/deb/sjaak/cmaketest/build
yann@home:build$ make
Scanning dependencies of target foo
[100%] Building CXX object CMakeFiles/foo.dir/src/foo.cc.o
Linking CXX executable foo
[100%] Built target foo
yann@home:build$ cmake .. -DCMAKE_C_COMPILER=clang-3.4
-DCMAKE_CXX_COMPILER=clang++-3.4
-- Configuring done
-- Generating done
-- Build files have been written to: /work/yann/deb/sjaak/cmaketest/build
yann@home:build$ make
[100%] Building CXX object CMakeFiles/foo.dir/src/foo.cc.o
make[2]: /work/yann/deb/sjaak/cmaketest/build/clang++-3.4: Command not found
CMakeFiles/foo.dir/build.make:54: recipe for target
'CMakeFiles/foo.dir/src/foo.cc.o' failed
make[2]: *** [CMakeFiles/foo.dir/src/foo.cc.o] Error 127
CMakeFiles/Makefile2:60: recipe for target 'CMakeFiles/foo.dir/all' failed
make[1]: *** [CMakeFiles/foo.dir/all] Error 2
Makefile:76: recipe for target 'all' failed
make: *** [all] Error 2
No such behaviour is observed when just "cmake .." is used.
When one of the compiler is changed, the result is even more broken,
here following an erroneous use of CXX=clang-3.4. See how
alternatively CC and CXX get a wrong setup one after the other, with
the only way out being to restart from scratch:
yann@home:build$ rm -rf *
yann@home:build$ cmake .. -DCMAKE_C_COMPILER=clang-3.4
-DCMAKE_CXX_COMPILER=clang-3.4
-- The CXX compiler identification is Clang 3.4.2
-- The C compiler identification is Clang 3.4.2
-- Check for working CXX compiler: /usr/bin/clang-3.4
-- Check for working CXX compiler: /usr/bin/clang-3.4 -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working C compiler: /usr/bin/clang-3.4
-- Check for working C compiler: /usr/bin/clang-3.4 -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Configuring done
-- Generating done
-- Build files have been written to: /work/yann/deb/sjaak/cmaketest/build
yann@home:build$ cmake .. -DCMAKE_C_COMPILER=clang-3.4
-DCMAKE_CXX_COMPILER=clang++-3.4
-- Configuring done
You have changed variables that require your cache to be deleted.
Configure will be re-run and you may have to reset some variables.
The following variables have changed:
CMAKE_CXX_COMPILER= clang++-3.4
-- The CXX compiler identification is Clang 3.4.2
-- The C compiler identification is GNU 4.9.1
-- Check for working CXX compiler: /usr/bin/clang++-3.4
-- Check for working CXX compiler: /usr/bin/clang++-3.4 -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Configuring done
-- Generating done
-- Build files have been written to: /work/yann/deb/sjaak/cmaketest/build
yann@home:build$ cmake .. -DCMAKE_C_COMPILER=clang-3.4
-DCMAKE_CXX_COMPILER=clang++-3.4
-- Configuring done
You have changed variables that require your cache to be deleted.
Configure will be re-run and you may have to reset some variables.
The following variables have changed:
CMAKE_C_COMPILER= clang-3.4
-- The CXX compiler identification is GNU 4.9.1
-- The C compiler identification is Clang 3.4.2
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working C compiler: /usr/bin/clang-3.4
-- Check for working C compiler: /usr/bin/clang-3.4 -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Configuring done
-- Generating done
-- Build files have been written to: /work/yann/deb/sjaak/cmaketest/build
Files used:
=== CMakeLists.txt
project(foo CXX C)
add_executable ("foo" src/foo.cc)
=== src/foo.cc
int main(void)
{
return 1;
}
===
-- System Information:
Debian Release: jessie/sid
APT prefers testing
APT policy: (990, 'testing'), (500, 'unstable'), (500, 'stable'), (101,
'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 3.16-3-amd64 (SMP w/4 CPU cores)
Locale: LANG=C, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
Versions of packages cmake depends on:
ii cmake-data 3.0.2-1
ii dpkg 1.17.21
ii libarchive13 3.1.2-9
ii libc6 2.19-13
ii libcurl3 7.38.0-3
ii libexpat1 2.1.0-6+b3
ii libgcc1 1:4.9.1-19
ii libstdc++6 4.9.1-19
ii procps 2:3.3.9-8
ii zlib1g 1:1.2.8.dfsg-2
Versions of packages cmake recommends:
ii gcc 4:4.9.1-5
ii make 4.0-8
Versions of packages cmake suggests:
ii codeblocks 13.12-3
pn eclipse <none>
ii ninja-build 1.3.4-1.2
-- no debconf information
--
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