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Make Cosmopolitan ANSI C89 compatible

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You can now use cosmopolitan.h with an ANSI C89 compiler like MSVC. The
Cosmopolitan codebase itself won't support being compiled that way. But
you can build objects that link against Cosmopolitan using any compiler
and you can furthermore use tools like IntelliSense that can't even GNU

See also #40
This commit is contained in:
Justine Tunney
2021-02-03 17:48:59 -08:00
parent 46085797b6
commit a8d7195777
34 changed files with 262 additions and 9561 deletions
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18
libc/integral/c.inc
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@ -601,7 +601,13 @@ typedef uint64_t uintmax_t;
#endif
#ifndef unreachable
#if defined(__GNUC__) && !defined(__STRICT_ANSI)
#define unreachable __builtin_unreachable()
#else
#define unreachable \
do { \
} while (1)
#endif
#endif
#define donothing \
@ -754,13 +760,13 @@ typedef uint64_t uintmax_t;
#endif /* ANSI */
#endif /* -w */
#ifdef __STRICT_ANSI__
#ifndef __STRICT_ANSI__
#define DebugBreak() asm("int3")
#else
#define DebugBreak() (void)0
#endif
#ifdef __STRICT_ANSI__
#ifndef __STRICT_ANSI__
#define VEIL(CONSTRAINT, EXPRESSION) \
({ \
autotype(EXPRESSION) VeiledValue = (EXPRESSION); \
@ -771,7 +777,7 @@ typedef uint64_t uintmax_t;
#define VEIL(CONSTRAINT, EXPRESSION) (EXPRESSION)
#endif
#ifdef __STRICT_ANSI__
#ifndef __STRICT_ANSI__
#define CONCEAL(CONSTRAINT, EXPRESSION) \
({ \
autotype(EXPRESSION) VeiledValue = (EXPRESSION); \
@ -782,7 +788,7 @@ typedef uint64_t uintmax_t;
#define CONCEAL(CONSTRAINT, EXPRESSION) (EXPRESSION)
#endif
#ifdef __STRICT_ANSI__
#ifndef __STRICT_ANSI__
#define EXPROPRIATE(EXPRESSION) \
({ \
asm volatile("" ::"g"(EXPRESSION) : "memory"); \
@ -792,7 +798,7 @@ typedef uint64_t uintmax_t;
#define EXPROPRIATE(EXPRESSION) (EXPRESSION)
#endif
#ifdef __STRICT_ANSI__
#ifndef __STRICT_ANSI__
#define YOINK(SYMBOL) \
do { \
_Static_assert(!__builtin_types_compatible_p(typeof(SYMBOL), char[]), \
@ -807,7 +813,7 @@ typedef uint64_t uintmax_t;
#define YOINK(SYMBOL) (void)0
#endif
#ifdef __STRICT_ANSI__
#ifndef __STRICT_ANSI__
#define STATIC_YOINK(SYMBOLSTR) \
asm(".section .yoink\n\tnopl\t\"" SYMBOLSTR "\"\n\t.previous")
#else