implicit declaration of function ‘strptime’ #47
Description
Attempting to compile on Gentoo Linux with gcc (Gentoo 15.1.0 p55) 15.1.0 and glibc-2.41-r1 I get the following error:
Compiling: Src/Dc_Shared.c -> build/release/Src/Dc_Shared.o
In file included from Src/Dc_Shared.c:16:
Src/File_AppleSingle.h:20:1: warning: ‘static’ is not at beginning of declaration [-Wold-style-declaration]
20 | const unsigned static int AS_MAGIC;
| ^~~~~
Src/Dc_Prodos.c: In function ‘UpdateProdosImage’:
Src/Dc_Prodos.c:170:10: warning: variable ‘nb_write’ set but not used [-Wunused-but-set-variable]
170 | int i, nb_write;
| ^~~~~~~~
Src/Dc_Prodos.c: In function ‘GetDataFile’:
Src/Dc_Prodos.c:1719:50: warning: variable ‘resource_blocks_used’ set but not used [-Wunused-but-set-variable]
1719 | int resource_storage_type, resource_key_block, resource_blocks_used, resource_eof;
| ^~~~~~~~~~~~~~~~~~~~
Src/Dc_Prodos.c:1718:42: warning: variable ‘data_blocks_used’ set but not used [-Wunused-but-set-variable]
1718 | int data_storage_type, data_key_block, data_blocks_used, data_eof;
| ^~~~~~~~~~~~~~~~
Src/Dc_Prodos.c: In function ‘GetCurrentDate’:
Src/Dc_Prodos.c:2219:5: error: implicit declaration of function ‘strptime’; did you mean ‘strftime’? [-Wimplicit-function-declaration]
2219 | strptime(source_date_epoch_env, "%s", &source_date_epoch_tm);
| ^~~~~~~~
| strftime
make[1]: *** [Makefile:222: build/release/Src/Dc_Prodos.o] Error 1
make[1]: *** Waiting for unfinished jobs....
Compile time: 00:00:00
Compile time: 00:00:00
make: *** [Makefile:153: release] Error 2
Adding to the top of src/Dc_Prodos.c:
#define _XOPEN_SOURCE 700
Fixes it. Not sure if that's the proper solution or not.