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54 lines
1.7 KiB
Plaintext
54 lines
1.7 KiB
Plaintext
# uint32_t.m4 serial 4
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# Copyright (C) 2004 Free Software Foundation, Inc.
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# This file is free software; the Free Software Foundation
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# gives unlimited permission to copy and/or distribute it,
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# with or without modifications, as long as this notice is preserved.
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# Written by Paul Eggert.
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AC_DEFUN([gl_AC_TYPE_UINT32_T],
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[
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AC_CACHE_CHECK([for uint32_t], gl_cv_c_uint32_t,
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[gl_cv_c_uint32_t=no
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for ac_type in "uint32_t" "unsigned int" \
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"unsigned long int" "unsigned short int"; do
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AC_COMPILE_IFELSE(
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[AC_LANG_BOOL_COMPILE_TRY(
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[AC_INCLUDES_DEFAULT],
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[[($ac_type) -1 == 4294967295U]])],
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[gl_cv_c_uint32_t=$ac_type])
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test "$gl_cv_c_uint32_t" != no && break
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done])
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case "$gl_cv_c_uint32_t" in
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no|uint32_t) ;;
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*)
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AC_DEFINE(_UINT32_T, 1,
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[Define for Solaris 2.5.1 so uint32_t typedef from <sys/synch.h>,
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<pthread.h>, or <semaphore.h> is not used. If the typedef was
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allowed, the #define below would cause a syntax error.])
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AC_DEFINE_UNQUOTED(uint32_t, $gl_cv_c_uint32_t,
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[Define to the type of a unsigned integer type of width exactly 32 bits
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if such a type exists and the standard includes do not define it.])
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;;
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esac
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AC_CACHE_CHECK([for UINT32_MAX], gl_cv_c_uint32_max,
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[AC_COMPILE_IFELSE(
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[AC_LANG_BOOL_COMPILE_TRY(
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[AC_INCLUDES_DEFAULT],
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[[UINT32_MAX == 4294967295U]])],
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[gl_cv_c_uint32_max=yes],
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[gl_cv_c_uint32_max=no])])
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case $gl_cv_c_uint32_max,$gl_cv_c_uint32_t in
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yes,*) ;;
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*,no) ;;
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*)
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AC_DEFINE(UINT32_MAX, 4294967295U,
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[Define to its maximum value if an unsigned integer type of width
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exactly 32 bits exists and the standard includes do not define
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UINT32_MAX.])
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;;
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esac
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])
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