384 lines
12 KiB
CMake
384 lines
12 KiB
CMake
# Helper functions for translating autoconf projects. Several functions
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# are lifted from the Mono sources
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include (CheckCSourceCompiles)
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include (CheckIncludeFile)
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include (TestBigEndian)
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include (CheckFunctionExists)
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include (CheckTypeSize)
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include (CheckCSourceRuns)
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# Function to get the version information from the configure.ac file in the
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# current directory. Its argument is the name of the library as passed to
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# AC_INIT. It will set the variables ${LIBNAME}_VERSION and ${LIBNAME}_SOVERSION
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function (ac_get_version libname)
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string(TOUPPER "${libname}" libname_upper)
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# Read the relevant content from configure.ac
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file (STRINGS configure.ac tmp_configure_ac
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REGEX "${libname_upper}_[_A-Z]+=[ \\t]*[0-9]+")
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# Product version
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string (REGEX REPLACE ".+MAJOR[_A-Z]+=([0-9]+).+MINOR[_A-Z]+=([0-9]+).+MICRO[_A-Z]+=([0-9]+).*"
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"\\1.\\2.\\3" ${libname_upper}_VERSION "${tmp_configure_ac}")
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# Library version for libtool
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string (REGEX REPLACE ".+CURRENT=([0-9]+).+REVISION=([0-9]+).+AGE=([0-9]+).*"
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"\\1.\\2.\\3" ${libname_upper}_SOVERSION "${tmp_configure_ac}")
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# Checks if the string needs to be displayed
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set (${libname_upper}_DISPLAYSTR_AUX
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"Found ${libname} version ${${libname_upper}_VERSION}, soversion ${${libname_upper}_SOVERSION} from configure.ac"
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)
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if ((NOT ${libname_upper}_DISPLAYSTR) OR (NOT ${libname_upper}_DISPLAYSTR STREQUAL ${libname_upper}_DISPLAYSTR_AUX))
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set (${libname_upper}_DISPLAYSTR ${${libname_upper}_DISPLAYSTR_AUX}
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CACHE INTERNAL "Version string from ${libname}" FORCE)
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message (STATUS ${${libname_upper}_DISPLAYSTR})
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endif ()
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# Export the result to the caller
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set(${libname_upper}_VERSION "${${libname_upper}_VERSION}" PARENT_SCOPE)
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set(${libname_upper}_SOVERSION "${${libname_upper}_SOVERSION}" PARENT_SCOPE)
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endfunction()
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# Also from mono's source code
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# Implementation of AC_CHECK_HEADERS
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# In addition, it also records the list of variables in the variable
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# 'autoheader_vars', and for each variable, a documentation string in the
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# variable ${var}_doc
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function(ac_check_headers)
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foreach (header ${ARGV})
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string(TOUPPER ${header} header_var)
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string(REPLACE "." "_" header_var ${header_var})
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string(REPLACE "/" "_" header_var ${header_var})
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set(header_var "HAVE_${header_var}")
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check_include_file (${header} ${header_var})
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set("${header_var}_doc" "Define to 1 if you have the <${header}> header file." PARENT_SCOPE)
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if (${header_var})
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set("${header_var}_defined" "1" PARENT_SCOPE)
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endif()
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set("${header_var}_val" "1" PARENT_SCOPE)
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set (autoheader_vars ${autoheader_vars} ${header_var})
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endforeach()
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set (autoheader_vars ${autoheader_vars} PARENT_SCOPE)
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endfunction()
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# Function taken from mono's source code
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function (ac_check_funcs)
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foreach (func ${ARGV})
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string(TOUPPER ${func} var)
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set(var "HAVE_${var}")
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set(${var})
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check_function_exists (${func} ${var})
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set("${var}_doc" "Define to 1 if you have the '${func}' function." PARENT_SCOPE)
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if (${var})
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set("${var}_defined" "1" PARENT_SCOPE)
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set(${var} yes PARENT_SCOPE)
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endif()
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set("${var}_val" "1" PARENT_SCOPE)
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set (autoheader_vars ${autoheader_vars} ${var})
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endforeach()
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set (autoheader_vars ${autoheader_vars} PARENT_SCOPE)
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endfunction()
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# Specifically, this macro checks for stdlib.h', stdarg.h',
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# string.h', and float.h'; if the system has those, it probably
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# has the rest of the ANSI C header files. This macro also checks
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# whether string.h' declares memchr' (and thus presumably the
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# other mem' functions), whether stdlib.h' declare free' (and
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# thus presumably malloc' and other related functions), and whether
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# the ctype.h' macros work on characters with the high bit set, as
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# ANSI C requires.
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function (ac_header_stdc)
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if (STDC_HEADERS)
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return()
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endif()
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message(STATUS "Looking for ANSI-C headers")
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set(code "
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#include <stdlib.h>
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#include <stdarg.h>
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#include <string.h>
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#include <float.h>
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int main(int argc, char **argv)
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{
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void *ptr;
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free((void*)1);
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ptr = memchr((void*)1, 0, 0);
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return (int)ptr;
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}
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")
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# FIXME Check the ctype.h high bit
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CHECK_C_SOURCE_COMPILES("${code}" STDC_HEADERS)
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if (STDC_HEADERS)
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set(STDC_HEADERS 1 PARENT_SCOPE)
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message(STATUS "Looking for ANSI-C headers - found")
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else()
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message(STATUS "Looking for ANSI-C headers - not found")
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endif()
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endfunction()
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# Also from the mono sources, kind of implements AC_SYS_LARGEFILE
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function (ac_sys_largefile)
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CHECK_C_SOURCE_RUNS("
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#include <sys/types.h>
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#define BIG_OFF_T (((off_t)1<<62)-1+((off_t)1<<62))
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int main (int argc, char **argv) {
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int big_off_t=((BIG_OFF_T%2147483629==721) &&
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(BIG_OFF_T%2147483647==1));
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return big_off ? 0 : 1;
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}
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" HAVE_LARGE_FILE_SUPPORT)
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# Check if it makes sense to define _LARGE_FILES or _FILE_OFFSET_BITS
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if (HAVE_LARGE_FILE_SUPPORT)
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return()
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endif()
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set (_LARGE_FILE_EXTRA_SRC "
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#include <sys/types.h>
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int main (int argc, char **argv) {
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return sizeof(off_t) == 8 ? 0 : 1;
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}
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")
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CHECK_C_SOURCE_RUNS ("#define _LARGE_FILES\n${_LARGE_FILE_EXTRA_SRC}"
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HAVE_USEFUL_D_LARGE_FILES)
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if (NOT HAVE_USEFUL_D_LARGE_FILES)
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if (NOT DEFINED HAVE_USEFUL_D_FILE_OFFSET_BITS)
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set (SHOW_LARGE_FILE_WARNING TRUE)
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endif ()
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CHECK_C_SOURCE_RUNS ("#define _FILE_OFFSET_BITS 64\n${_LARGE_FILE_EXTRA_SRC}"
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HAVE_USEFUL_D_FILE_OFFSET_BITS)
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if (HAVE_USEFUL_D_FILE_OFFSET_BITS)
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set (_FILE_OFFSET_BITS 64 PARENT_SCOPE)
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elseif (SHOW_LARGE_FILE_WARNING)
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message (WARNING "No 64 bit file support through off_t available.")
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endif ()
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else ()
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set (_LARGE_FILES 1 PARENT_SCOPE)
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endif ()
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endfunction ()
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# Quick way to set some basic variables
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# FIXME add support for variable number of arguments: only package and version are mandatory
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# arguments are package version bug_report tarname url
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function (ac_init)
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set(package ${ARGV0})
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set(version ${ARGV1})
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set(bug_report ${ARGV2})
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set(tarname ${ARGV3})
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set(url ${ARGV4})
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set(PACKAGE_NAME "\"${package}\"" PARENT_SCOPE)
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set(PACKAGE_VERSION "\"${version}\"" PARENT_SCOPE)
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set(VERSION "\"${version}\"" PARENT_SCOPE)
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if(version)
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set(PACKAGE_STRING "\"${package} ${version}\"" PARENT_SCOPE)
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else()
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set(PACKAGE_STRING "\"${package}\"" PARENT_SCOPE)
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endif()
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set(PACKAGE_BUGREPORT "\"${bug_report}\"" PARENT_SCOPE)
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if(NOT tarname)
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string(REGEX REPLACE "[^a-zA-Z0-9_]" "-" tarname "${package}")
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endif()
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set(PACKAGE_TARNAME "\"${tarname}\"" PARENT_SCOPE)
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set(PACKAGE_URL "\"${url}\"" PARENT_SCOPE)
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endfunction()
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# Checks for the const keyword, defining "HAS_CONST_SUPPORT"
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# If it does not have support, defines "const" to 0 in the parent scope
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function (ac_c_const)
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CHECK_C_SOURCE_COMPILES(
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"int main(int argc, char **argv){const int r = 0;return r;}"
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HAS_CONST_SUPPORT)
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if (NOT HAS_CONST_SUPPORT)
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set(const 0 PARENT_SCOPE)
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endif()
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endfunction()
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# Inline keyword support. Defines "inline" in the parent scope to the
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# compiler internal keyword for inline in C
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# TODO write a better test!
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function (ac_c_inline)
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if (MSVC)
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set (inline __inline)
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elseif(CMAKE_COMPILER_IS_GNUC)
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set (inline __inline__)
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endif()
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set(inline "${inline}" PARENT_SCOPE)
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endfunction()
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# Test if you can safely include both <sys/time.h> and <time.h>
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function (ac_header_time)
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CHECK_C_SOURCE_COMPILES(
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"#include <sys/time.h>\n#include <time.h>\nint main(int argc, char **argv) { return 0; }"
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TIME_WITH_SYS_TIME)
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set(TIME_WITH_SYS_TIME ${TIME_WITH_SYS_TIME} PARENT_SCOPE)
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endfunction()
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# Native cpu byte order: 1 if big-endian (Motorola) or 0 if little-endian
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# (Intel), setting "WORDS_BIGENDIAN" to 1 if big endian
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function (ac_c_bigendian)
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TEST_BIG_ENDIAN(HOST_BIGENDIAN)
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if (HOST_BIGENDIAN)
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set(WORDS_BIGENDIAN 1 PARENT_SCOPE)
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endif()
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endfunction()
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# Check for off_t, setting "off_t" in the parent scope
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function(ac_type_off_t)
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CHECK_TYPE_SIZE("off_t" SIZEOF_OFF_T)
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if (NOT SIZEOF_OFF_T)
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set(off_t "long int")
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endif()
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set(off_t ${off_t} PARENT_SCOPE)
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endfunction()
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# Check for size_t, setting "size_t" in the parent scope
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function(ac_type_size_t)
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CHECK_TYPE_SIZE("size_t" SIZEOF_SIZE_T)
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if (NOT SIZEOF_SIZE_T)
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set(size_t "unsigned int")
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endif()
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set(size_t ${size_t} PARENT_SCOPE)
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endfunction()
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# Define "TM_IN_SYS_TIME" to 1 if <sys/time.h> declares "struct tm"
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function(ac_struct_tm)
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CHECK_C_SOURCE_COMPILES(
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"#include <sys/time.h>\nint main(int argc, char **argv) { struct tm x; return 0; }"
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TM_IN_SYS_TIME
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)
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if (TM_IN_SYS_TIME)
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set (TM_IN_SYS_TIME 1 PARENT_SCOPE)
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endif()
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endfunction()
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# Obtain size of an 'type' and define as SIZEOF_TYPE
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function (ac_check_sizeof typename)
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string(TOUPPER "SIZEOF_${typename}" varname)
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string(REPLACE " " "_" varname "${varname}")
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string(REPLACE "*" "p" varname "${varname}")
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CHECK_TYPE_SIZE("${typename}" ${varname} BUILTIN_TYPES_ONLY)
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if(NOT ${varname})
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set(${varname} 0 PARENT_SCOPE)
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endif()
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endfunction()
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# Check if the type exists, defines HAVE_<type>
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function (ac_check_type typename)
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string(TOUPPER "${typename}" varname)
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string(REPLACE " " "_" varname "${varname}")
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string(REPLACE "*" "p" varname "${varname}")
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CHECK_TYPE_SIZE("${typename}" ${varname})
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if (NOT "${varname}" STREQUAL "")
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set("HAVE_${varname}" 1 PARENT_SCOPE)
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set("${varname}" "${typename}" PARENT_SCOPE)
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else()
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set("${varname}" "unknown" PARENT_SCOPE)
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endif()
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endfunction()
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# Verifies if each type on the list exists, using the given prelude
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function (ac_check_types type_list prelude)
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foreach(typename ${type_list})
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string(TOUPPER "HAVE_${typename}" varname)
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string(REPLACE " " "_" varname "${varname}")
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string(REPLACE "*" "p" varname "${varname}")
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CHECK_C_SOURCE_COMPILES("${prelude}\n ${typename} foo;" ${varname})
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endforeach()
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endfunction()
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function(ac_path_prog variable prog_to_check_for value_if_not_found env_var)
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find_program(${variable} NAMES ${prog_to_check_for} PATHS ENV ${env_var} NO_DEFAULT_PATH)
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if(NOT ${variable})
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message(STATUS "Looking for ${prog_to_check_for} - not found")
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set(${variable} ${value_if_not_fount} PARENT_SCOPE)
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else()
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message(STATUS "Looking for ${prog_to_check_for} - ${variable}")
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set(${variable} ${${variable}} PARENT_SCOPE)
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endif()
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endfunction()
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# check if function func exists in library lib
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function(ac_check_lib lib func)
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string(TOUPPER "HAVE_${func}" varname)
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set(CMAKE_REQUIRED_LIBRARIES ${lib})
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check_function_exists(${func} ${varname})
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set(CMAKE_REQUIRED_LIBRARIES)
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endfunction()
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# check if source compiles without linking
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function(ac_try_compile SOURCE VAR)
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set(CMAKE_TMP_DIR ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp)
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if(NOT DEFINED "${VAR}")
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file(WRITE
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"${CMAKE_TMP_DIR}/src.c"
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"${SOURCE}\n"
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)
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if(NOT CMAKE_REQUIRED_QUIET)
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message(STATUS "Performing Test ${VAR}")
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endif()
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# Set up CMakeLists.txt for static library:
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file(WRITE
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${CMAKE_TMP_DIR}/CMakeLists.txt
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"add_library(compile STATIC src.c)"
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)
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# Configure:
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execute_process(
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COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" .
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WORKING_DIRECTORY ${CMAKE_TMP_DIR}
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)
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# Build:
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execute_process(
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COMMAND ${CMAKE_COMMAND} --build ${CMAKE_TMP_DIR}
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RESULT_VARIABLE RESVAR
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OUTPUT_VARIABLE OUTPUT
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ERROR_VARIABLE OUTPUT
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)
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# Set up result:
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if(RESVAR EQUAL 0)
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set(${VAR} 1 CACHE INTERNAL "Test ${VAR}")
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if(NOT CMAKE_REQUIRED_QUIET)
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message(STATUS "Performing Test ${VAR} - Success")
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endif()
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file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
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"Performing C SOURCE FILE Test ${VAR} succeded with the following output:\n"
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"${OUTPUT}\n"
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"Source file was:\n${SOURCE}\n")
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else()
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if(NOT CMAKE_REQUIRED_QUIET)
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message(STATUS "Performing Test ${VAR} - Failed")
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endif()
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set(${VAR} "" CACHE INTERNAL "Test ${VAR}")
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file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
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"Performing C SOURCE FILE Test ${VAR} failed with the following output:\n"
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"${OUTPUT}\n"
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"Source file was:\n${SOURCE}\n")
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endif()
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endif()
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endfunction()
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