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autoconf: modernize and modularize

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Use my modular m4 library used for other things as well; update
autoconf macros to 2.71 standard.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
H. Peter Anvin 2024-06-10 18:24:53 -07:00
parent 33051a296c
commit fefaa2cc5c
35 changed files with 680 additions and 461 deletions
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27
autoconf/m4/pa_add_langflags.m4 Normal file
View file

@ -0,0 +1,27 @@
dnl --------------------------------------------------------------------------
dnl PA_ADD_LANGFLAGS(flag...)
dnl
dnl Attempt to add the option in the given list to each compiler flags
dnl (CFLAGS, CXXFLAGS, ...), if it doesn't break compilation.
dnl --------------------------------------------------------------------------
m4_defun([_PA_LANGFLAG_VAR],
[m4_case([$1],
[C], [CFLAGS],
[C++], [CXXFLAGS],
[Fortran 77], [FFLAGS],
[Fortran], [FCFLAGS],
[Erlang], [ERLCFLAGS],
[Objective C], [OBJCFLAGS],
[Objective C++], [OBJCXXFLAGS],
[Go], [GOFLAGS],
[m4_fatal([PA_ADD_LANGFLAGS: Unknown language: $1])])])
AC_DEFUN([PA_ADD_LANGFLAGS],
[m4_pushdef([_pa_langflags],m4_dquote($1))dnl
m4_set_foreach(_PA_LANG_SEEN_SET,[_pa_lang],dnl
[_pa_flag_found=no
m4_foreach_w([_pa_flag], _pa_langflags,
[AS_IF([test $_pa_flag_found = no],
[PA_ADD_FLAGS(_PA_LANGFLAG_VAR(_pa_lang),_pa_flag,[],[_pa_flag_found=yes])])
])])
m4_popdef([_pa_langflags])])