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AC_DEFUN([_ENSC_DIETLIBC_C99], |
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[ |
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AH_TEMPLATE([ENSC_DIETLIBC_C99], [Define to 1 if dietlibc supports C99]) |
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AC_CACHE_CHECK([whether dietlibc supports C99], [ensc_cv_c_dietlibc_c99], |
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[ |
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_ensc_dietlibc_c99_old_CFLAGS=$CFLAGS |
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_ensc_dietlibc_c99_old_CC=$CC |
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CFLAGS="-std=c99" |
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CC="${DIET:-diet} $CC" |
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AC_LANG_PUSH(C) |
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AC_COMPILE_IFELSE([/* */],[ |
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AC_COMPILE_IFELSE([ |
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volatile uint64_t a; |
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], |
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[ensc_cv_c_dietlibc_c99=yes], |
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[ensc_cv_c_dietlibc_c99=no])], |
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[ensc_cv_c_dietlibc_c99='skipped (compiler does not support C99)']) |
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AC_LANG_POP |
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CC=$_ensc_dietlibc_c99_old_CC |
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CFLAGS=$_ensc_dietlibc_c99_old_CFLAGS |
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]) |
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if test x"$ensc_cv_c_dietlibc_c99" = xyes; then |
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AC_DEFINE(ENSC_DIETLIBC_C99,1) |
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fi |
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]) |
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AC_DEFUN([_ENSC_DIETLIBC_SYSCALL], |
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[ |
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AH_TEMPLATE([ENSC_DIETLIBC_HAS_SYSCALL], [Define to 1 if dietlibc declares syscall]) |
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AC_CACHE_CHECK([whether dietlibc declares syscall], [ensc_cv_c_dietlibc_syscall], |
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[ |
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_ensc_dietlibc_syscall_old_CC="$CC" |
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CC="${DIET:-diet} $CC" |
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AC_LANG_PUSH(C) |
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AC_COMPILE_IFELSE([ |
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long int syscall(long int __sysno, ...); |
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], |
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[ensc_cv_c_dietlibc_syscall=no], |
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[ensc_cv_c_dietlibc_syscall=yes]) |
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AC_LANG_POP |
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CC="$_ensc_dietlibc_syscall_old_CC" |
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]) |
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if test x"$ensc_cv_c_dietlibc_syscall" = xyes; then |
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AC_DEFINE(ENSC_DIETLIBC_HAS_SYSCALL,1) |
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fi |
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]) |
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AC_DEFUN([ENSC_ENABLE_DIETLIBC], |
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[ |
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AC_MSG_CHECKING([whether to enable dietlibc]) |
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AC_ARG_VAR(DIET, [The 'diet' wrapper (default: diet)]) |
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AC_ARG_VAR(DIETFLAGS, [Flags passed to the 'diet' wrapper (default: -O)]) |
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: ${DIET:=diet} |
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: ${DIETFLAGS=-Os} |
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AC_ARG_ENABLE([dietlibc], |
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[AS_HELP_STRING([--disable-dietlibc], |
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[do not use dietlibc resp. enforce its usage |
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(with --enable-dietlibc) (default: autodetect dietlibc)])], |
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[case "$enableval" in |
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(yes) use_dietlibc=forced;; |
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(no) use_dietlibc=forced_no;; |
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(*) AC_MSG_ERROR(['$enableval' is not a valid value for --enable-dietlibc]);; |
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esac], |
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[which "$DIET" >/dev/null 2>/dev/null && use_dietlibc=detected || use_dietlibc=detected_no]) |
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if test "$use_dietlibc" = detected -a "$2"; then |
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_dietlibc_ver=$($DIET -v 2>&1 | sed '1p;d') |
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_dietlibc_ver=${_dietlibc_ver |
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_dietlibc_ver=${_dietlibc_ver |
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_dietlibc_ver_maj=${_dietlibc_ver%%.*} |
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_dietlibc_ver_min=${_dietlibc_ver |
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_dietlibc_ver_min=${_dietlibc_ver_min%%[[!0-9]]*} |
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_dietlibc_cmp="$2" |
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_dietlibc_cmp_maj=${_dietlibc_cmp%%.*} |
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_dietlibc_cmp_min=${_dietlibc_cmp |
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ENSC_VERSION_DIETLIBC=$_dietlibc_ver_maj.$_dietlibc_ver_min |
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let _dietlibc_ver=_dietlibc_ver_maj*1000+_dietlibc_ver_min 2>/dev/null || _dietlibc_ver=0 |
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let _dietlibc_cmp=_dietlibc_cmp_maj*1000+_dietlibc_cmp_min |
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test $_dietlibc_ver -ge $_dietlibc_cmp || use_dietlibc=detected_old |
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else |
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ENSC_VERSION_DIETLIBC= |
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_dietlibc_ver=-1 |
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fi |
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ENSC_VERSION_DIETLIBC_NUM=$_dietlibc_ver |
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ensc_have_dietlibc=no |
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case x"$use_dietlibc" in |
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xdetected) |
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AM_CONDITIONAL($1, true) |
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AC_MSG_RESULT([yes (autodetected, $ENSC_VERSION_DIETLIBC)]) |
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ensc_have_dietlibc=yes |
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;; |
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xforced) |
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AM_CONDITIONAL($1, true) |
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AC_MSG_RESULT([yes (forced)]) |
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ensc_have_dietlibc=yes |
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;; |
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xdetected_no) |
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AM_CONDITIONAL($1, false) |
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AC_MSG_RESULT([no (detected)]) |
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;; |
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xdetected_old) |
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AM_CONDITIONAL($1, false) |
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AC_MSG_RESULT([no (too old; $2+ required, $ENSC_VERSION_DIETLIBC found)]) |
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;; |
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xforced_no) |
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AM_CONDITIONAL($1, false) |
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AC_MSG_RESULT([no (forced)]) |
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;; |
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*) |
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AC_MSG_ERROR([internal error, use_dietlibc was "$use_dietlibc"]) |
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;; |
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esac |
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if test x"$ensc_have_dietlibc" != xno; then |
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_ENSC_DIETLIBC_C99 |
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_ENSC_DIETLIBC_SYSCALL |
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fi |
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]) |
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