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57 lines
1.7 KiB
Plaintext
57 lines
1.7 KiB
Plaintext
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dnl check RAII requirements
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dnl
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dnl gcc / llvm-gcc: -fnested-functions
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dnl clang : -fblocks / -fblocks and -lBlocksRuntime"
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AC_DEFUN([AST_CHECK_RAII], [
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AC_MSG_CHECKING([for RAII support])
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AST_C_COMPILER_FAMILY=""
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AC_LINK_IFELSE(
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[AC_LANG_PROGRAM([], [
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int main() {
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#if defined(__clang__)
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choke
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#endif
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return 0;
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}
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])
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],[
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dnl Nested functions required for RAII implementation
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AC_MSG_CHECKING(for gcc -fnested-functions)
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AC_COMPILE_IFELSE(
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dnl Prototype needed due to http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36774
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[
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AC_LANG_PROGRAM([], [auto void foo(void); void foo(void) {}])
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],[
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AST_NESTED_FUNCTIONS=""
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AC_MSG_RESULT(no)
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],[
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AST_NESTED_FUNCTIONS="-fnested-functions"
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AC_MSG_RESULT(yes)
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]
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)
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AC_SUBST(AST_NESTED_FUNCTIONS)
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AST_C_COMPILER_FAMILY="gcc"
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],[
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AC_MSG_CHECKING(for clang -fblocks)
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if test "`echo "int main(){return ^{return 42;}();}" | ${CC} -o /dev/null -fblocks -x c - 2>&1`" = ""; then
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AST_CLANG_BLOCKS_LIBS=""
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AST_CLANG_BLOCKS="-Wno-unknown-warning-option -fblocks"
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AC_MSG_RESULT(yes)
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elif test "`echo "int main(){return ^{return 42;}();}" | ${CC} -o /dev/null -fblocks -x c -lBlocksRuntime - 2>&1`" = ""; then
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AST_CLANG_BLOCKS_LIBS="-lBlocksRuntime"
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AST_CLANG_BLOCKS="-fblocks"
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AC_MSG_RESULT(yes)
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else
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AC_MSG_ERROR([BlocksRuntime is required for clang, please install libblocksruntime])
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fi
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AC_SUBST(AST_CLANG_BLOCKS_LIBS)
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AC_SUBST(AST_CLANG_BLOCKS)
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AST_C_COMPILER_FAMILY="clang"
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]
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)
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if test -z "${AST_C_COMPILER_FAMILY}"; then
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AC_MSG_ERROR([Compiler ${CC} not supported. Mminimum required gcc-4.3 / llvm-gcc-4.3 / clang-3.3 + libblocksruntime-dev])
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fi
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AC_SUBST(AST_C_COMPILER_FAMILY)
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])
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