The CMake function fckit_target_preprocess_fypp automatically adds all definitions to fypp for preprocessing.
One issue reported by Ioan was encountered with the valid definition -D_POSIX_C_SOURCE=200809L:
error: exception at evaluating '200809L' in definition for '_POSIX_C_SOURCE' [FyppFatalError]
error: unexpected EOF while parsing (<string>, line 1) [SyntaxError]
Internal to fypp (in Python) there occurs a eval('200809L') which triggers a Python exception as follows:
>>> eval('200809L')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "<string>", line 1
200809L
^SyntaxError: invalid decimal
and this causes the fypp preprocessing to fail.
To work around we introduce two mechanisms to remove this definition from being passed to the fypp preprocessor:
1) An extra argument FYPP_ARGS_EXCLUDE arg1 [arg2]... to the fckit_target_preprocess_fypp function
2) A general FCKIT_FYPP_ARGS_EXCLUDE list which can be added to e.g. a toolchain or CMake command-line.
The arguments or list elements described can be regular expressions as understood by bash and shall not contain a comma.
By default we already add the regex -D[[:space:]]?.*=([0-9])+L which captures the -D_POSIX_C_SOURCE=200809L argument reported in this issue.
The CMake function
fckit_target_preprocess_fyppautomatically adds all definitions tofyppfor preprocessing. One issue reported by Ioan was encountered with the valid definition-D_POSIX_C_SOURCE=200809L:Internal to fypp (in Python) there occurs a
eval('200809L')which triggers a Python exception as follows:and this causes the fypp preprocessing to fail. To work around we introduce two mechanisms to remove this definition from being passed to the fypp preprocessor: 1) An extra argument
FYPP_ARGS_EXCLUDE arg1 [arg2]...to thefckit_target_preprocess_fyppfunction 2) A generalFCKIT_FYPP_ARGS_EXCLUDElist which can be added to e.g. a toolchain or CMake command-line.The arguments or list elements described can be regular expressions as understood by
bashand shall not contain a comma. By default we already add the regex-D[[:space:]]?.*=([0-9])+Lwhich captures the-D_POSIX_C_SOURCE=200809Largument reported in this issue.