View Issue Details [ Jump to Notes ]

[ Print ]

Project

Category

View Status

Date Submitted

Last Update

0013855

CMake

Modules

public

2013-01-17 17:39

2013-06-03 09:05

Reporter

Andres Gomez

Assigned To

Priority

high

Severity

major

Reproducibility

always

Status

closed

Resolution

no change required

Platform

Linux x86_64

Ubuntu

OS Version

12.10

Product Version

CMake 2.8.9

Target Version

Fixed in Version

Summary

0013855: Cross compilation with MinGW fails on initial GCC compilation test because mingw doesn't support the -rdynamic linking flag

Description

When configuring a simple program with CMake support it fails because CMake is not able to find a C compiler capable of compiling a simple test program.

The error happens because, as we try to crosscompile, the C compiler program found is MinGW (/usr/bin/i686-w64-mingw32-gcc), which doesn't support the Linking "-rdynamic" flag.

Steps To Reproduce

$ cmake .
debug trycompile on
-- The C compiler identification is GNU 4.6.3
-- Check for working C compiler: /usr/bin/i686-w64-mingw32-gcc
-- Check for working C compiler: /usr/bin/i686-w64-mingw32-gcc -- broken
CMake Error at /usr/share/cmake-2.8/Modules/CMakeTestCCompiler.cmake:61 (message):
  The C compiler "/usr/bin/i686-w64-mingw32-gcc" is not able to compile a
  simple test program.

  It fails with the following output:

   Change Dir: /home/tanty/swftools-jhbuild.git/checkout.dbg/openjpeg-2.0.0/CMakeFiles/CMakeTmp

  Run Build Command:/usr/bin/make "cmTryCompileExec4018385851/fast"

  /usr/bin/make -f CMakeFiles/cmTryCompileExec4018385851.dir/build.make
  CMakeFiles/cmTryCompileExec4018385851.dir/build

  make[1]: Entering directory
  `/home/tanty/swftools-jhbuild.git/checkout.dbg/openjpeg-2.0.0/CMakeFiles/CMakeTmp'

  /usr/bin/cmake -E cmake_progress_report
  /home/tanty/swftools-jhbuild.git/checkout.dbg/openjpeg-2.0.0/CMakeFiles/CMakeTmp/CMakeFiles
  1

  Building C object

  CMakeFiles/cmTryCompileExec4018385851.dir/testCCompiler.c.o

  /usr/bin/i686-w64-mingw32-gcc -mms-bitfields -march=i686
  -I/home/tanty/swftools-jhbuild.git/mingw-target.dbg//include -D_WIN32=1
  -D__USE_MINGW_ANSIO_STDIO=1 -DWIN32=1 -DOPJ_STATIC=1 -g -O0 -o
  CMakeFiles/cmTryCompileExec4018385851.dir/testCCompiler.c.o -c

  /home/tanty/swftools-jhbuild.git/checkout.dbg/openjpeg-2.0.0/CMakeFiles/CMakeTmp/testCCompiler.c

  Linking C executable cmTryCompileExec4018385851

  /usr/bin/cmake -E cmake_link_script
  CMakeFiles/cmTryCompileExec4018385851.dir/link.txt --verbose=1

  /usr/bin/i686-w64-mingw32-gcc -mms-bitfields -march=i686
  -I/home/tanty/swftools-jhbuild.git/mingw-target.dbg//include -D_WIN32=1
  -D__USE_MINGW_ANSIO_STDIO=1 -DWIN32=1 -DOPJ_STATIC=1 -g -O0
  -L/home/tanty/swftools-jhbuild.git/mingw-target.dbg/lib64
  -L/home/tanty/swftools-jhbuild.git/mingw-target.dbg//lib -static
  CMakeFiles/cmTryCompileExec4018385851.dir/testCCompiler.c.o -o
  cmTryCompileExec4018385851 -rdynamic

  i686-w64-mingw32-gcc: error: unrecognized option '-rdynamic'

  make[1]: *** [cmTryCompileExec4018385851] Error 1

  make[1]: Leaving directory
  `/home/tanty/swftools-jhbuild.git/checkout.dbg/openjpeg-2.0.0/CMakeFiles/CMakeTmp'

  make: *** [cmTryCompileExec4018385851/fast] Error 2

  CMake will not be able to correctly generate this project.
Call Stack (most recent call first):
  CMakeLists.txt:24 (project)

-- Configuring incomplete, errors occurred!

Tags

No tags attached.

Attached Files

No--rdynamic-flag-for-MINGW.patch [^] (678 bytes) 2013-01-17 17:43 [Show Content] [Hide Content]

diff -urN cmake-2.8.9.orig/Modules/Platform/Linux-GNU.cmake cmake-2.8.9/Modules/Platform/Linux-GNU.cmake
--- cmake-2.8.9.orig/Modules/Platform/Linux-GNU.cmake	2012-08-09 18:15:19.000000000 +0000
+++ cmake-2.8.9/Modules/Platform/Linux-GNU.cmake	2013-01-17 18:07:39.026239581 +0000
@@ -21,5 +21,9 @@
 macro(__linux_compiler_gnu lang)
   # We pass this for historical reasons.  Projects may have
   # executables that use dlopen but do not set ENABLE_EXPORTS.
-  set(CMAKE_SHARED_LIBRARY_LINK_${lang}_FLAGS "-rdynamic")
+  if(MINGW)
+    set(CMAKE_SHARED_LIBRARY_LINK_${lang}_FLAGS "")
+  else()
+    set(CMAKE_SHARED_LIBRARY_LINK_${lang}_FLAGS "-rdynamic")
+  endif()
 endmacro()

Relationships

Notes
(0032115) Andres Gomez (reporter) 2013-01-17 17:43	The problem seems to be the CMAKE_SHARED_LIBRARY_LINK_C_FLAGS macro which is set to "-rdynamic" in the Modules/Platform/Linux-GNU.cmake file. This patch sets that linking flag conditionally to the presence of MINGW.

(0032120) Brad King (manager) 2013-01-18 09:13	The problem is that Linux-GNU is getting loaded when cross-compiling for Windows. When cross compiling the toolchain file should set CMAKE_SYSTEM_NAME to Windows so that Linux platform information is not loaded.

(0032123) Andres Gomez (reporter) 2013-01-18 12:25	You are right, the problem is not using the proper toolchain file as described in: http://www.cmake.org/Wiki/CmakeMingw [^] This report is invalid, although it is interesting that CMake is not that helpful to make the developer aware about the need of this toolchain file.

(0033188) Robert Maynard (manager) 2013-06-03 09:05	Closing resolved issues that have not been updated in more than 4 months.

Issue History
Date Modified	Username	Field	Change
2013-01-17 17:39	Andres Gomez	New Issue
2013-01-17 17:43	Andres Gomez	Note Added: 0032115
2013-01-17 17:43	Andres Gomez	File Added: No--rdynamic-flag-for-MINGW.patch
2013-01-18 09:13	Brad King	Note Added: 0032120
2013-01-18 12:25	Andres Gomez	Note Added: 0032123
2013-01-18 13:18	Brad King	Status	new => resolved
2013-01-18 13:18	Brad King	Resolution	open => no change required
2013-06-03 09:05	Robert Maynard	Note Added: 0033188
2013-06-03 09:05	Robert Maynard	Status	resolved => closed