CODEWITHSUNDEEP
cmake
Fedorov7890
Fedorov7890

Reputation: 1245

How to skip 32/64bit-ness check in xxxConfigVersion.cmake

There is a header-only C++ library. When I use write_basic_package_version_file(), to create ...ConfigVersion.cmake file, not only version is checked but also 32/64 bitness compatibility:

# if the installed or the using project don't
# have CMAKE_SIZEOF_VOID_P set, ignore it:
if("${CMAKE_SIZEOF_VOID_P}" STREQUAL "" OR "8" STREQUAL "")
   return()
endif()

# check that the installed version has the 
# same 32/64bit-ness as the one which is currently searching:
if(NOT CMAKE_SIZEOF_VOID_P STREQUAL "8")
  math(EXPR installedBits "8 * 8")
  set(PACKAGE_VERSION "${PACKAGE_VERSION} (${installedBits}bit)")
  set(PACKAGE_VERSION_UNSUITABLE TRUE)
endif()

This doesn't have any sense for header-only lib. I can delete that code manually, but is there an elegant way not to generate this "addition"?

Upvotes: 0

Views: 280

Answers (1)

J-Christophe
J-Christophe

Reputation: 2060

If you project unset the variable CMAKE_SIZEOF_VOID_P (or set to an empty string) before calling write_basic_package_version_file() this would ensure the check for bitness is disabled.

Indeed, the following snippet used on all BasicConfigVersion-*.in templates:

# if the installed or the using project don't have CMAKE_SIZEOF_VOID_P set, ignore it:
if("${CMAKE_SIZEOF_VOID_P}" STREQUAL "" OR "@CMAKE_SIZEOF_VOID_P@" STREQUAL "")
    return()
endif()

would be configured as 

if("${CMAKE_SIZEOF_VOID_P}" STREQUAL "" OR "" STREQUAL "")
    return()
endif()

and always return.

Upvotes: 1

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