On 5/23/07, Alan W. Irwin <[EMAIL PROTECTED]> wrote:
On 2007-05-23 09:50+0800 Clark J. Wang wrote: > In Cygwin environment I have a C source file named `grep.c' which needs > `libpcre' to compile. The CMakeLists.txt writes: > > PROJECT(myGrep) > > SET(CMAKE_VERBOSE_MAKEFILE ON) > > FIND_PROGRAM(PCRE_CONFIG pcre-config) > IF(PCRE_CONFIG) > ADD_EXECUTABLE(grep_pcre grep.c) > SET_TARGET_PROPERTIES(grep_pcre > PROPERTIES > COMPILE_FLAGS "-DUSE_PCRE $(shell pcre-config --cflags)" > LINK_FLAGS "$(shell pcre-config --libs)" > ) > ENDIF(PCRE_CONFIG) It's possible the above style might be made to work, but I am not sure about that so let me recommend a style that I know works in general for dealing with the results of external configuration scripts (although I have no specific experience with pcre-config).
The program `pcre-config' is used to determine paths of libpcre's header file and library file. Actually in my Cygwin environment the above CMakeLists.txt is the same as this one: PROJECT(myGrep) SET(CMAKE_VERBOSE_MAKEFILE ON) ADD_EXECUTABLE(grep_pcre grep.c) SET_TARGET_PROPERTIES(grep_pcre PROPERTIES COMPILE_FLAGS "-DUSE_PCRE" LINK_FLAGS "-L/usr/lib -lpcre" ) And this CMakeLists.txt does not work either. I suggest you use EXECUTE_PROCESS twice to run the configuration script to
determine compiler flags and the full path of the library that you need. Store those results in different CMake variables, then use SET_SOURCE_FILES_PROPERTIES to set the compile flags, and use TARGET_LINK_LIBRARIES to link your executable target to the external library (specified with its full path). Alan __________________________ Alan W. Irwin Astronomical research affiliation with Department of Physics and Astronomy, University of Victoria (astrowww.phys.uvic.ca). Programming affiliations with the FreeEOS equation-of-state implementation for stellar interiors (freeeos.sf.net); PLplot scientific plotting software package (plplot.org); the libLASi project (unifont.org/lasi); the Loads of Linux Links project (loll.sf.net); and the Linux Brochure Project (lbproject.sf.net). __________________________ Linux-powered Science __________________________
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