CMake/Modules/CheckVariableExists.c

#ifdef CHECK_VARIABLE_EXISTS

extern int CHECK_VARIABLE_EXISTS;

#ifdef __CLASSIC_C__
int main()
{
  int ac;
  char* av[];
#else
int main(int ac, char* av[])
{
#endif
  if (ac > 1000) {
    return *av[0];
  }
  return CHECK_VARIABLE_EXISTS;
}

#else /* CHECK_VARIABLE_EXISTS */

#error "CHECK_VARIABLE_EXISTS has to specify the variable"

#endif /* CHECK_VARIABLE_EXISTS */
ENH: Added CHECK_VARIABLE_EXISTS macro. 2002-11-21 18:11:46 +03:00			`#ifdef CHECK_VARIABLE_EXISTS`

			`extern int CHECK_VARIABLE_EXISTS;`

ENH: fix tests for non-ansi c on hp and remove warnings for ansi c 2004-04-15 16:22:19 +04:00			`#ifdef __CLASSIC_C__`
Revise C++ coding style using clang-format Run the `Utilities/Scripts/clang-format.bash` script to update all our C++ code to a new style defined by `.clang-format`. Use `clang-format` version 3.8. * If you reached this commit for a line in `git blame`, re-run the blame operation starting at the parent of this commit to see older history for the content. * See the parent commit for instructions to rebase a change across this style transition commit. 2016-05-16 17:34:04 +03:00			`int main()`
			`{`
ENH: fix tests for non-ansi c on hp and remove warnings for ansi c 2004-04-15 16:22:19 +04:00			`int ac;`
Revise C++ coding style using clang-format Run the `Utilities/Scripts/clang-format.bash` script to update all our C++ code to a new style defined by `.clang-format`. Use `clang-format` version 3.8. * If you reached this commit for a line in `git blame`, re-run the blame operation starting at the parent of this commit to see older history for the content. * See the parent commit for instructions to rebase a change across this style transition commit. 2016-05-16 17:34:04 +03:00			`char* av[];`
ENH: fix tests for non-ansi c on hp and remove warnings for ansi c 2004-04-15 16:22:19 +04:00			`#else`
Revise C++ coding style using clang-format Run the `Utilities/Scripts/clang-format.bash` script to update all our C++ code to a new style defined by `.clang-format`. Use `clang-format` version 3.8. * If you reached this commit for a line in `git blame`, re-run the blame operation starting at the parent of this commit to see older history for the content. * See the parent commit for instructions to rebase a change across this style transition commit. 2016-05-16 17:34:04 +03:00			`int main(int ac, char* av[])`
			`{`
ENH: fix tests for non-ansi c on hp and remove warnings for ansi c 2004-04-15 16:22:19 +04:00			`#endif`
Revise C++ coding style using clang-format Run the `Utilities/Scripts/clang-format.bash` script to update all our C++ code to a new style defined by `.clang-format`. Use `clang-format` version 3.8. * If you reached this commit for a line in `git blame`, re-run the blame operation starting at the parent of this commit to see older history for the content. * See the parent commit for instructions to rebase a change across this style transition commit. 2016-05-16 17:34:04 +03:00			`if (ac > 1000) {`
			`return *av[0];`
			`}`
BUG#502: Do not let optimizing compilers think the symbol exists. Require the symbol by making the return value depend on it to force linking. 2004-04-26 18:19:44 +04:00			`return CHECK_VARIABLE_EXISTS;`
ENH: Added CHECK_VARIABLE_EXISTS macro. 2002-11-21 18:11:46 +03:00			`}`

Revise C++ coding style using clang-format Run the `Utilities/Scripts/clang-format.bash` script to update all our C++ code to a new style defined by `.clang-format`. Use `clang-format` version 3.8. * If you reached this commit for a line in `git blame`, re-run the blame operation starting at the parent of this commit to see older history for the content. * See the parent commit for instructions to rebase a change across this style transition commit. 2016-05-16 17:34:04 +03:00			`#else /* CHECK_VARIABLE_EXISTS */`
ENH: Added CHECK_VARIABLE_EXISTS macro. 2002-11-21 18:11:46 +03:00
Revise C++ coding style using clang-format Run the `Utilities/Scripts/clang-format.bash` script to update all our C++ code to a new style defined by `.clang-format`. Use `clang-format` version 3.8. * If you reached this commit for a line in `git blame`, re-run the blame operation starting at the parent of this commit to see older history for the content. * See the parent commit for instructions to rebase a change across this style transition commit. 2016-05-16 17:34:04 +03:00			`#error "CHECK_VARIABLE_EXISTS has to specify the variable"`
ENH: Added CHECK_VARIABLE_EXISTS macro. 2002-11-21 18:11:46 +03:00
			`#endif /* CHECK_VARIABLE_EXISTS */`