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* build: drop autotools supportDmitry V. Levin2024-10-231-85/+0
| | | | There is no point in supporting two different build systems.
* configure.ac: rewrite WARN_CFLAGS initializationDmitry V. Levin2020-08-061-0/+85
As the old machinery was not prepared for adding compiler options conditionally when the compiler supports them, replace it with a new machinery that implements this. * m4/warnings.m4: New file. * m4/warn_lang_flags.m4: Likewise. * m4/.gitignore: Add exclusions for them. * m4/japhar_grep_cflags.m4 (JAPHAR_GREP_CFLAGS): Remove. * configure.ac: Call pam_WARN_LANG_FLAGS. Remove all uses of JAPHAR_GREP_CFLAGS.