diff options
Diffstat (limited to 'src/compiler/glsl')
| -rw-r--r-- | src/compiler/glsl/builtin_functions.cpp | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/src/compiler/glsl/builtin_functions.cpp b/src/compiler/glsl/builtin_functions.cpp index 683217d7a35..b2fcdf37e07 100644 --- a/src/compiler/glsl/builtin_functions.cpp +++ b/src/compiler/glsl/builtin_functions.cpp @@ -53,6 +53,26 @@ * name and parameters. */ + +/** + * Unfortunately, some versions of MinGW produce bad code if this file + * is compiled with -O2 or -O3. The resulting driver will crash in random + * places if the app uses GLSL. + * The work-around is to disable optimizations for just this file. Luckily, + * this code is basically just executed once. + * + * MinGW 4.6.3 (in Ubuntu 13.10) does not have this bug. + * MinGW 5.3.1 (in Ubuntu 16.04) definitely has this bug. + * MinGW 6.2.0 (in Ubuntu 16.10) definitely has this bug. + * MinGW x.y.z - don't know. Assume versions after 4.6.x are buggy + */ + +#if defined(__MINGW32__) && ((__GNUC__ * 100) + __GNUC_MINOR >= 407) +#warning "disabling optimizations for this file to work around compiler bug" +#pragma GCC optimize("O1") +#endif + + #include <stdarg.h> #include <stdio.h> #include "main/core.h" /* for struct gl_shader */ |