A method of detecting whether, for a single target, LLVM supports its AsmParser

test.c

//#define current_target X86
#define current_target bogus

#define __STDC_LIMIT_MACROS
#define __STDC_CONSTANT_MACROS
#include "llvm-c/Target.h"
#include <stdbool.h>

#define JOIN2(a, b) a ## b
#define JOIN(a, b) JOIN2(a, b)

#define TARGET_VAR(t) JOIN(t, _printer)

int main()
{
    // no initializer needed
    bool TARGET_VAR(current_target);
    {
#define LLVM_ASM_PARSER(target)     \
        bool TARGET_VAR(target) = false;
#include "llvm/Config/AsmParsers.def"
        TARGET_VAR(current_target) = true;
#define LLVM_ASM_PARSER(target)     \
        if (TARGET_VAR(target))     \
            LLVMInitialize ## target ## AsmParser();
#include "llvm/Config/AsmParsers.def"
    }
}