Fix Cygwin support. Note: this is not a supported target.

Contributed by Yaakov Selkowitz.

3 files changed, 10 insertions, 4 deletions

diff --git a/src/lj_alloc.c b/src/lj_alloc.c
index 7c7ec678..9218c440 100644
--- a/src/lj_alloc.c
+++ b/src/lj_alloc.c
@@ -194,7 +194,7 @@ static LJ_AINLINE void *CALL_MMAP(size_t size)
   return ptr;
 }
 
-#elif LJ_TARGET_OSX || LJ_TARGET_PS4 || defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(__sun__)
+#elif LJ_TARGET_OSX || LJ_TARGET_PS4 || defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(__sun__) || defined(__CYGWIN__)
 
 /* OSX and FreeBSD mmap() use a naive first-fit linear search.
 ** That's perfect for us. Except that -pagezero_size must be set for OSX,
diff --git a/src/lj_arch.h b/src/lj_arch.h
index d89d1169..9a6d4305 100644
--- a/src/lj_arch.h
+++ b/src/lj_arch.h
@@ -151,7 +151,11 @@
 #define LJ_ARCH_NAME            "x64"
 #define LJ_ARCH_BITS            64
 #define LJ_ARCH_ENDIAN          LUAJIT_LE
-#define LJ_ABI_WIN              LJ_TARGET_WINDOWS
+#if LJ_TARGET_WINDOWS || __CYGWIN__
+#define LJ_ABI_WIN              1
+#else
+#define LJ_ABI_WIN              0
+#endif
 #define LJ_TARGET_X64           1
 #define LJ_TARGET_X86ORX64      1
 #define LJ_TARGET_EHRETREG      0
diff --git a/src/lj_err.c b/src/lj_err.c
index 11b07b56..6d8519bb 100644
--- a/src/lj_err.c
+++ b/src/lj_err.c
@@ -186,7 +186,7 @@ static void *err_unwind(lua_State *L, void *stopcf, int errcode)
 
 /* -- External frame unwinding -------------------------------------------- */
 
-#if defined(__GNUC__) && !LJ_NO_UNWIND && !LJ_TARGET_WINDOWS
+#if defined(__GNUC__) && !LJ_NO_UNWIND && !LJ_ABI_WIN
 
 /*
 ** We have to use our own definitions instead of the mandatory (!) unwind.h,
@@ -352,7 +352,7 @@ LJ_FUNCA int lj_err_unwind_arm(int state, void *ucb, _Unwind_Context *ctx)
 
 #endif
 
-#elif LJ_TARGET_X64 && LJ_TARGET_WINDOWS
+#elif LJ_TARGET_X64 && LJ_ABI_WIN
 
 /*
 ** Someone in Redmond owes me several days of my life. A lot of this is
@@ -417,7 +417,9 @@ LJ_FUNCA EXCEPTION_DISPOSITION lj_err_unwind_win64(EXCEPTION_RECORD *rec,
     if (cf2) {  /* We catch it, so start unwinding the upper frames. */
       if (rec->ExceptionCode == LJ_MSVC_EXCODE ||
           rec->ExceptionCode == LJ_GCC_EXCODE) {
+#if LJ_TARGET_WINDOWS
         __DestructExceptionObject(rec, 1);
+#endif
         setstrV(L, L->top++, lj_err_str(L, LJ_ERR_ERRCPP));
       } else if (!LJ_EXCODE_CHECK(rec->ExceptionCode)) {
         /* Don't catch access violations etc. */