From fca32ded9f942e9667ca57ecd86d0437ef611c57 Mon Sep 17 00:00:00 2001 From: Bruno Haible Date: Mon, 29 Aug 2005 13:10:35 +0000 Subject: [PATCH] Determination of integer parameters when cross-compiling. --- m4/intparam.m4 | 298 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 298 insertions(+) create mode 100644 m4/intparam.m4 diff --git a/m4/intparam.m4 b/m4/intparam.m4 new file mode 100644 index 0000000..b9967bb --- /dev/null +++ b/m4/intparam.m4 @@ -0,0 +1,298 @@ +# intparam.m4 serial 1 +dnl Copyright (C) 2005 Free Software Foundation, Inc. +dnl This file is free software; the Free Software Foundation +dnl gives unlimited permission to copy and/or distribute it, +dnl with or without modifications, as long as this notice is preserved. + +dnl From Bruno Haible. + +AC_DEFUN([CL_INTPARAM_CROSS], +[ + AC_REQUIRE([CL_LONGLONG]) + AC_REQUIRE([CL_LONGDOUBLE]) + AC_REQUIRE([AC_C_BIGENDIAN]) + cl_machine_file_h=$1 + { + CL_INTPARAM_BITSIZE([signed char], [char_bitsize]) + CL_INTPARAM_BITSIZE([short], [short_bitsize]) + CL_INTPARAM_BITSIZE([int], [int_bitsize]) + CL_INTPARAM_BITSIZE([long], [long_bitsize]) + if test $cl_cv_c_longlong = yes; then + CL_INTPARAM_BITSIZE([long long], [longlong_bitsize]) + fi + CL_INTPARAM_BITSIZE([unsigned char], [uchar_bitsize]) + CL_INTPARAM_BITSIZE([unsigned short], [ushort_bitsize]) + CL_INTPARAM_BITSIZE([unsigned int], [uint_bitsize]) + CL_INTPARAM_BITSIZE([unsigned long], [ulong_bitsize]) + if test $cl_cv_c_longlong = yes; then + CL_INTPARAM_BITSIZE([unsigned long long], [ulonglong_bitsize]) + fi + if test -n "$char_bitsize"; then + echo "/* Integers of type char have $char_bitsize bits. */" + echo "#define char_bitsize $char_bitsize" + echo + else + echo "#error \"Integers of type char have no binary representation!!\"" + fi + if test -n "$short_bitsize"; then + echo "/* Integers of type short have $short_bitsize bits. */" + echo "#define short_bitsize $short_bitsize" + echo + else + echo "#error \"Integers of type short have no binary representation!!\"" + fi + if test -n "$int_bitsize"; then + echo "/* Integers of type int have $int_bitsize bits. */" + echo "#define int_bitsize $int_bitsize" + echo + else + echo "#error \"Integers of type int have no binary representation!!\"" + fi + if test -n "$long_bitsize"; then + echo "/* Integers of type long have $long_bitsize bits. */" + echo "#define long_bitsize $long_bitsize" + echo + else + echo "#error \"Integers of type long have no binary representation!!\"" + fi + if test $cl_cv_c_longlong = yes; then + if test -n "$longlong_bitsize"; then + echo "/* Integers of type long long have $longlong_bitsize bits. */" + echo "#define long_long_bitsize $longlong_bitsize" + echo + else + echo "#error \"Integers of type long long have no binary representation!!\"" + fi + fi + if test -n "$uchar_bitsize"; then + echo "/* Integers of type unsigned char have $uchar_bitsize bits. */" + echo + else + echo "#error \"Integers of type unsigned char have no binary representation!!\"" + fi + if test -n "$ushort_bitsize"; then + echo "/* Integers of type unsigned short have $ushort_bitsize bits. */" + echo + else + echo "#error \"Integers of type unsigned short have no binary representation!!\"" + fi + if test -n "$uint_bitsize"; then + echo "/* Integers of type unsigned int have $uint_bitsize bits. */" + echo + else + echo "#error \"Integers of type unsigned int have no binary representation!!\"" + fi + if test -n "$ulong_bitsize"; then + echo "/* Integers of type unsigned long have $ulong_bitsize bits. */" + echo + else + echo "#error \"Integers of type unsigned long have no binary representation!!\"" + fi + if test $cl_cv_c_longlong = yes; then + if test -n "$ulonglong_bitsize"; then + echo "/* Integers of type unsigned long long have $ulonglong_bitsize bits. */" + echo + else + echo "#error \"Integers of type unsigned long long have no binary representation!!\"" + fi + fi + if test "$char_bitsize" != "$uchar_bitsize"; then + echo "#error \"Integer types char and unsigned char have different sizes!!\"" + fi + if test "$short_bitsize" != "$ushort_bitsize"; then + echo "#error \"Integer types short and unsigned short have different sizes!!\"" + fi + if test "$int_bitsize" != "$uint_bitsize"; then + echo "#error \"Integer types int and unsigned int have different sizes!!\"" + fi + if test "$long_bitsize" != "$ulong_bitsize"; then + echo "#error \"Integer types long and unsigned long have different sizes!!\"" + fi + if test $cl_cv_c_longlong = yes; then + if test "$longlong_bitsize" != "$ulonglong_bitsize"; then + echo "#error \"Integer types long long and unsigned long long have different sizes!!\"" + fi + fi + AC_TRY_COMPILE([], [typedef int verify[2*(sizeof(char*)<=sizeof (long))-1];], + [], [echo "#error \"Type char * does not fit into a long!!\""]) + _AC_COMPUTE_INT([sizeof (char *)], [pointer_size]) + pointer_bitsize=`expr $pointer_size '*' $char_bitsize` + echo "/* Pointers of type char * have $pointer_bitsize bits. */" + echo "#define pointer_bitsize $pointer_bitsize" + echo + CL_INTPARAM_SIZEOF([char], [sizeof_char]) + CL_INTPARAM_ALIGNOF([char], [alignment_char]) + echo "/* Type char has sizeof = $sizeof_char and alignment = $alignment_char. */" + echo "#define sizeof_char $sizeof_char" + echo "#define alignment_char $alignment_char" + echo + CL_INTPARAM_SIZEOF([unsigned char], [sizeof_uchar]) + CL_INTPARAM_ALIGNOF([unsigned char], [alignment_uchar]) + echo "/* Type unsigned char has sizeof = $sizeof_uchar and alignment = $alignment_uchar. */" + echo + CL_INTPARAM_SIZEOF([short], [sizeof_short]) + CL_INTPARAM_ALIGNOF([short], [alignment_short]) + echo "/* Type short has sizeof = $sizeof_short and alignment = $alignment_short. */" + echo "#define sizeof_short $sizeof_short" + echo "#define alignment_short $alignment_short" + echo + CL_INTPARAM_SIZEOF([unsigned short], [sizeof_ushort]) + CL_INTPARAM_ALIGNOF([unsigned short], [alignment_ushort]) + echo "/* Type unsigned short has sizeof = $sizeof_ushort and alignment = $alignment_ushort. */" + echo + CL_INTPARAM_SIZEOF([int], [sizeof_int]) + CL_INTPARAM_ALIGNOF([int], [alignment_int]) + echo "/* Type int has sizeof = $sizeof_int and alignment = $alignment_int. */" + echo "#define sizeof_int $sizeof_int" + echo "#define alignment_int $alignment_int" + echo + CL_INTPARAM_SIZEOF([unsigned int], [sizeof_uint]) + CL_INTPARAM_ALIGNOF([unsigned int], [alignment_uint]) + echo "/* Type unsigned int has sizeof = $sizeof_uint and alignment = $alignment_uint. */" + echo + CL_INTPARAM_SIZEOF([long], [sizeof_long]) + CL_INTPARAM_ALIGNOF([long], [alignment_long]) + echo "/* Type long has sizeof = $sizeof_long and alignment = $alignment_long. */" + echo "#define sizeof_long $sizeof_long" + echo "#define alignment_long $alignment_long" + echo + CL_INTPARAM_SIZEOF([unsigned long], [sizeof_ulong]) + CL_INTPARAM_ALIGNOF([unsigned long], [alignment_ulong]) + echo "/* Type unsigned long has sizeof = $sizeof_ulong and alignment = $alignment_ulong. */" + echo + if test $cl_cv_c_longlong = yes; then + CL_INTPARAM_SIZEOF([long long], [sizeof_longlong]) + CL_INTPARAM_ALIGNOF([long long], [alignment_longlong]) + echo "/* Type long long has sizeof = $sizeof_longlong and alignment = $alignment_longlong. */" + echo "#define sizeof_long_long $sizeof_longlong" + echo "#define alignment_long_long $alignment_longlong" + echo + CL_INTPARAM_SIZEOF([unsigned long long], [sizeof_ulonglong]) + CL_INTPARAM_ALIGNOF([unsigned long long], [alignment_ulonglong]) + echo "/* Type unsigned long long has sizeof = $sizeof_ulonglong and alignment = $alignment_ulonglong. */" + echo + fi + CL_INTPARAM_SIZEOF([float], [sizeof_float]) + CL_INTPARAM_ALIGNOF([float], [alignment_float]) + echo "/* Type float has sizeof = $sizeof_float and alignment = $alignment_float. */" + echo "#define sizeof_float $sizeof_float" + echo "#define alignment_float $alignment_float" + echo + CL_INTPARAM_SIZEOF([double], [sizeof_double]) + CL_INTPARAM_ALIGNOF([double], [alignment_double]) + echo "/* Type double has sizeof = $sizeof_double and alignment = $alignment_double. */" + echo "#define sizeof_double $sizeof_double" + echo "#define alignment_double $alignment_double" + echo + if test $cl_cv_c_longdouble = yes; then + CL_INTPARAM_SIZEOF([long double], [sizeof_longdouble]) + CL_INTPARAM_ALIGNOF([long double], [alignment_longdouble]) + echo "/* Type long double has sizeof = $sizeof_longdouble and alignment = $alignment_longdouble. */" + echo "#define sizeof_long_double $sizeof_longdouble" + echo "#define alignment_long_double $alignment_longdouble" + echo + fi + CL_INTPARAM_SIZEOF([char *], [sizeof_char_ptr]) + CL_INTPARAM_ALIGNOF([char *], [alignment_char_ptr]) + echo "/* Type char * has sizeof = $sizeof_char_ptr and alignment = $alignment_char_ptr. */" + echo + CL_INTPARAM_SIZEOF([long *], [sizeof_long_ptr]) + CL_INTPARAM_ALIGNOF([long *], [alignment_long_ptr]) + echo "/* Type long * has sizeof = $sizeof_long_ptr and alignment = $alignment_long_ptr. */" + echo + CL_INTPARAM_SIZEOF([void (*)(void)], [sizeof_function_ptr]) + CL_INTPARAM_ALIGNOF([void (*)(void)], [alignment_function_ptr]) + echo "/* Type function * has sizeof = $sizeof_function_ptr and alignment = $alignment_function_ptr. */" + echo + case $ac_cv_c_bigendian in + yes) + echo "/* Type unsigned short is stored BIG-ENDIAN in memory (i.e. like mc68000 or sparc). */" + echo "#define short_big_endian" + echo "/* Type unsigned int is stored BIG-ENDIAN in memory (i.e. like mc68000 or sparc). */" + echo "#define int_big_endian" + echo "/* Type unsigned long is stored BIG-ENDIAN in memory (i.e. like mc68000 or sparc). */" + echo "#define long_big_endian" + if test $cl_cv_c_longlong = yes; then + echo "/* Type unsigned long long is stored BIG-ENDIAN in memory (i.e. like mc68000 or sparc). */" + echo "#define long_long_big_endian" + fi + ;; + no) + echo "/* Type unsigned short is stored LITTLE-ENDIAN in memory (i.e. like Z80 or VAX). */" + echo "#define short_little_endian" + echo "/* Type unsigned int is stored LITTLE-ENDIAN in memory (i.e. like Z80 or VAX). */" + echo "#define int_little_endian" + echo "/* Type unsigned long is stored LITTLE-ENDIAN in memory (i.e. like Z80 or VAX). */" + echo "#define long_little_endian" + if test $cl_cv_c_longlong = yes; then + echo "/* Type unsigned long long is stored LITTLE-ENDIAN in memory (i.e. like Z80 or VAX). */" + echo "#define long_long_little_endian" + fi + ;; + *) + echo "#error \"Type short is stored in memory in an obscure manner!!\"" + echo "#error \"Type int is stored in memory in an obscure manner!!\"" + echo "#error \"Type long is stored in memory in an obscure manner!!\"" + if test $cl_cv_c_longlong = yes; then + echo "#error \"Type long long is stored in memory in an obscure manner!!\"" + fi + ;; + esac + echo + case $host_cpu in + hppa) + echo "/* Stack grows up. */" + echo "#define stack_grows_up" + ;; + *) + echo "/* Stack grows down. */" + echo "#define stack_grows_down" + ;; + esac + } > "$cl_machine_file_h" +]) + +dnl CL_INTPARAM_BITSIZE(type, variable) +dnl puts into variable the determined bitsize of the type. +AC_DEFUN([CL_INTPARAM_BITSIZE], +[ + n=1; x="($1)2" + while true; do + AC_TRY_COMPILE([], [typedef int verify[2*(($1)($x) == 0) - 1];], + [$2=$n; break;], + [if test $n = 1000; then $2=; break; fi;]) + n=`expr $n + 1`; x="$x * ($1)2" + done +]) + +dnl CL_INTPARAM_SIZEOF(type, variable) +dnl puts into variable the determined size of the type. +AC_DEFUN([CL_INTPARAM_SIZEOF], +[ + _AC_COMPUTE_INT([sizeof($1)], [$2]) +]) + +dnl CL_INTPARAM_ALIGNOF(type, variable) +dnl puts into variable the determined alignment of the type. +AC_DEFUN([CL_INTPARAM_ALIGNOF], +[ + dnl Simplify the guessing by assuming that the alignment is a power of 2. + n=1 + while true; do + AC_TRY_COMPILE([ +#ifdef __cplusplus +# ifdef __GNUC__ +# define alignof(type) __alignof__ (type) +# else + template struct alignof_helper { char slot1; type slot2; }; +# define alignof(type) offsetof (alignof_helper, slot2) +# endif +#else +# define alignof(type) offsetof (struct { char slot1; type slot2; }, slot2) +#endif +], [typedef int verify[2*(alignof($1) == $n) - 1];], + [$2=$n; break;] + [if test $n = 0; then $2=; break; fi]) + n=`expr $n '*' 2` + done +])