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dnl
dnl Check for minimum version of libtool
dnl AC_PREREQ_LIBTOOL([MINIMUM VERSION],[ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND ]])
AC_DEFUN([AC_PREREQ_LIBTOOL],
[
lt_min_full=ifelse([$1], ,1.3.5,$1)
lt_min=`echo $lt_min_full | sed -e 's/\.//g'`
AC_MSG_CHECKING(checking for libtool >= $lt_min_full)
lt_version="`grep ^VERSION ./ltconfig | sed -e 's/\.//g' | sed -e 's/VERSION\=//'`"
if test $lt_version -lt 100; then
lt_version=`expr $lt_version \* 10`
fi
if test $lt_version -lt $lt_min; then
AC_MSG_RESULT(no)
ifelse([$3], , :, [$3])
fi
AC_MSG_RESULT(yes)
ifelse([$2], , :, [$2])
])
dnl
AC_DEFUN([AC_CHECK_LIRC],
[AC_ARG_ENABLE(lirc,
[ --disable-lirc Turn off LIRC support.],
, enable_lirc=yes)
if test x"$enable_lirc" = xyes; then
have_lirc=yes
AC_REQUIRE_CPP
AC_CHECK_LIB(lirc_client,lirc_init,
AC_CHECK_HEADER(lirc/lirc_client.h, true, have_lirc=no), have_lirc=no)
if test "$have_lirc" = "yes"; then
if test x"$LIRC_PREFIX" != "x"; then
lirc_libprefix="$LIRC_PREFIX/lib"
LIRC_INCLUDE="-I$LIRC_PREFIX/include"
fi
for llirc in $lirc_libprefix /lib /usr/lib /usr/local/lib; do
AC_CHECK_FILE("$llirc/liblirc_client.a",
LIRC_LIBS="$llirc/liblirc_client.a"
AC_DEFINE(HAVE_LIRC),,)
done
else
AC_MSG_RESULT([*** LIRC client support not available, LIRC support will be disabled ***]);
fi
fi
AC_SUBST(LIRC_LIBS)
AC_SUBST(LIRC_INCLUDE)
])
dnl AC_C_ATTRIBUTE_ALIGNED
dnl define ATTRIBUTE_ALIGNED_MAX to the maximum alignment if this is supported
AC_DEFUN([AC_C_ATTRIBUTE_ALIGNED],
[AC_CACHE_CHECK([__attribute__ ((aligned ())) support],
[ac_cv_c_attribute_aligned],
[ac_cv_c_attribute_aligned=0
for ac_cv_c_attr_align_try in 2 4 8 16 32 64; do
AC_TRY_COMPILE([],
[static char c __attribute__ ((aligned($ac_cv_c_attr_align_try))) = 0
; return c;],
[ac_cv_c_attribute_aligned=$ac_cv_c_attr_align_try])
done])
if test x"$ac_cv_c_attribute_aligned" != x"0"; then
AC_DEFINE_UNQUOTED([ATTRIBUTE_ALIGNED_MAX],
[$ac_cv_c_attribute_aligned],[maximum supported data alignment])
fi])
dnl AC_TRY_CFLAGS (CFLAGS, [ACTION-IF-WORKS], [ACTION-IF-FAILS])
dnl check if $CC supports a given set of cflags
AC_DEFUN([AC_TRY_CFLAGS],
[AC_MSG_CHECKING([if $CC supports $1 flags])
SAVE_CFLAGS="$CFLAGS"
CFLAGS="$1"
AC_TRY_COMPILE([],[],[ac_cv_try_cflags_ok=yes],[ac_cv_try_cflags_ok=no])
CFLAGS="$SAVE_CFLAGS"
AC_MSG_RESULT([$ac_cv_try_cflags_ok])
if test x"$ac_cv_try_cflags_ok" = x"yes"; then
ifelse([$2],[],[:],[$2])
else
ifelse([$3],[],[:],[$3])
fi])
dnl AC_CHECK_GENERATE_INTTYPES_H (INCLUDE-DIRECTORY)
dnl generate a default inttypes.h if the header file does not exist already
AC_DEFUN([AC_CHECK_GENERATE_INTTYPES],
[AC_CHECK_HEADER([inttypes.h],[],
[AC_COMPILE_CHECK_SIZEOF([char],[1])
AC_COMPILE_CHECK_SIZEOF([short],[2])
AC_COMPILE_CHECK_SIZEOF([int],[4])
AC_COMPILE_CHECK_SIZEOF([long long],[8])
cat >$1/inttypes.h << EOF
#ifndef _INTTYPES_H
#define _INTTYPES_H
/* default inttypes.h for people who do not have it on their system */
#if (!defined __int8_t_defined) && (!defined __BIT_TYPES_DEFINED__)
#define __int8_t_defined
typedef signed char int8_t;
typedef signed short int16_t;
typedef signed int int32_t;
#ifdef ARCH_X86
typedef signed long long int64_t;
#endif
#endif
#if (!defined _LINUX_TYPES_H)
typedef unsigned char uint8_t;
typedef unsigned short uint16_t;
typedef unsigned int uint32_t;
#ifdef ARCH_X86
typedef unsigned long long uint64_t;
#endif
#endif
#endif
EOF
])])
dnl AC_COMPILE_CHECK_SIZEOF (TYPE SUPPOSED-SIZE)
dnl abort if the given type does not have the supposed size
AC_DEFUN([AC_COMPILE_CHECK_SIZEOF],
[AC_MSG_CHECKING(that size of $1 is $2)
AC_TRY_COMPILE([],[switch (0) case 0: case (sizeof ($1) == $2):;],[],
[AC_MSG_ERROR([can not build a default inttypes.h])])
AC_MSG_RESULT([yes])])
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