31 lines
720 B
Plaintext
31 lines
720 B
Plaintext
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dnl Copyright (C) 2010 Vincent Torri <vtorri at univ-evry dot fr>
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dnl and Albin Tonnerre <albin dot tonnerre at gmail dot com>
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dnl That code is public domain and can be freely used or copied.
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dnl Macro that checks if a compiler flag is supported by the compiler.
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dnl Usage: OPJ_COMPILER_FLAG(flag)
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dnl flag is added to CFLAGS if supported.
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AC_DEFUN([OPJ_COMPILER_FLAG],
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[
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CFLAGS_save="${CFLAGS}"
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CFLAGS="${CFLAGS} $1"
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AC_LANG_PUSH([C])
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AC_MSG_CHECKING([whether the compiler supports $1])
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AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM([[]])],
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[have_flag="yes"],
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[have_flag="no"])
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AC_MSG_RESULT([${have_flag}])
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if test "x${have_flag}" = "xno" ; then
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CFLAGS="${CFLAGS_save}"
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fi
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AC_LANG_POP([C])
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])
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