currently scrot fails to build when either CC=c99 or CFLAGS contains -std=c99 because they disable _GNU_SOURCE feature-test-macro. to reproduce:
./autogen.sh && ./configure CC=c99 && make
or
./autogen.sh && ./configure CFLAGS="-std=c99" && make
we do not use any gnu c language extension, as such we should build fine under c99 or -std=c99
fix the build via appending -D_XOPEN_SOURCE=700L to the compile flags. which is equivalent to _POSIX_C_SOURCE=200809L except that it also unlocks the X/Open System Interfaces.
currently scrot fails to build when either CC=c99 or CFLAGS contains -std=c99 because they disable _GNU_SOURCE feature-test-macro. to reproduce:
or
we do not use any gnu c language extension, as such we should build fine under c99 or -std=c99
fix the build via appending
-D_XOPEN_SOURCE=700Lto the compile flags. which is equivalent to_POSIX_C_SOURCE=200809Lexcept that it also unlocks the X/Open System Interfaces.ref: https://man7.org/linux/man-pages/man7/feature_test_macros.7.html