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Evgeny Grin (Karlson2k)
9b1865f691
Useful to quickly define settings combination. Individual settings still could be overridden by individual parameters. Added autoconf macros for compiler and linker flags
64 lines
2.5 KiB
Plaintext
64 lines
2.5 KiB
Plaintext
# SYNOPSIS
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#
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# MHD_CHECK_ADD_CC_CFLAG([FLAG-TO-TEST], [VARIABLE-TO-EXTEND],
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# [ACTION-IF-SUPPORTED], [ACTION-IF-NOT-SUPPORTED])
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#
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# DESCRIPTION
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#
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# This macro checks whether the specific compiler flag is supported.
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# The check is performing by appending FLAG-TO-TEST to the value of
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# VARIABLE-TO-EXTEND (CFLAGS if not specified), then prepending result to
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# CFLAGS (unless VARIABLE-TO-EXTEND is CFLAGS), and then performing compile
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# and link test. If test succeed without warnings, then the flag is added to
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# VARIABLE-TO-EXTEND. Otherwise, if compile and link without test flag cannot
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# be done without any warning, the flag is considered to be unsuppoted.
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#
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# Example usage:
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#
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# MHD_CHECK_ADD_CC_CFLAG([-Wshadow], [additional_CFLAGS])
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#
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#
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# LICENSE
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#
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# Copyright (c) 2022 Karlson2k (Evgeny Grin) <k2k@narod.ru>
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#
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# Copying and distribution of this file, with or without modification, are
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# permitted in any medium without royalty provided the copyright notice
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# and this notice are preserved. This file is offered as-is, without any
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# warranty.
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#serial 1
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AC_DEFUN([MHD_CHECK_ADD_CC_CFLAG],[dnl
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_MHD_CHECK_ADD_CC_XFLAG([$1],[$2],[$3],[$4],[[CFLAGS]])dnl
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])
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# SYNOPSIS
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#
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# _MHD_CHECK_ADD_CC_XFLAG([FLAG-TO-TEST], [VARIABLE-TO-EXTEND],
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# [ACTION-IF-SUPPORTED], [ACTION-IF-NOT-SUPPORTED],
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# [CFLAGS|LDFLAGS])
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#
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AC_DEFUN([_MHD_CHECK_ADD_CC_XFLAG],[dnl
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AC_PREREQ([2.64])dnl for AS_VAR_IF, m4_ifnblank, m4_default
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AC_LANG_ASSERT([C])dnl
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m4_ifblank([$1], [m4_fatal([First macro argument must not be empty])])dnl
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m4_bmatch(_mhd_norm_expd([$1]), [\s],dnl
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[m4_fatal([First macro argument must not contain whitespaces])])dnl
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m4_bmatch(_mhd_norm_expd([$2]), [\s],dnl
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[m4_fatal([Second macro argument must not contain whitespaces])])dnl
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m4_bmatch([$1], [\$], [m4_fatal([$0: First macro argument must not contain '$'])])dnl
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m4_bmatch([$2], [\$], [m4_fatal([$0: Second macro argument must not contain '$'])])dnl
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m4_bmatch(_mhd_norm_expd([$5]), [^\(CFLAGS\|LDFLAGS\)$],[],dnl
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[m4_fatal([$0: Fifth macro argument must be either 'CFLAGS' or 'LDFLAGS; ']_mhd_norm_expd([$5])[' is not supported])])dnl
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m4_ifnblank([$2],
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[_MHD_CHECK_CC_XFLAG([$1], [$2],
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[MHD_APPEND_FLAG_TO_VAR(_mhd_norm_expd([$2]),_mhd_norm_expd([$1]))
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$3],[$4],[$5])],
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[_MHD_CHECK_CC_XFLAG([$1],_mhd_norm_expd([$5]),
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[MHD_APPEND_FLAG_TO_VAR(_mhd_norm_expd([$5]),_mhd_norm_expd([$1]))
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$3],[$4],[$5])]
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)
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])
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