Bug 10071 – 'real' alignment wrong on several platforms

--- cat > structsize.cpp <<EOF #include <stdio.h> #include <stddef.h> typedef long double real; struct S { int a; real d; bool e; }; S s; int main() { printf("struct size: %lu\n", sizeof(S)); printf("int offset: %lu\n", offsetof(S, a)); printf("real offset: %lu\n", offsetof(S, d)); printf("bool offset: %lu\n", offsetof(S, e)); return 0; } EOF clang++ -o structsize -m32 structsize.cpp && ./structsize --- prints --- struct size: 48 int offset: 0 real offset: 16 bool offset: 32 --- but --- cat > structsize.d <<EOF struct S { int a; real d; bool e; }; pragma(msg, "struct size: ", S.sizeof); pragma(msg, "int offset: ", S.a.offsetof); pragma(msg, "real offset: ", S.d.offsetof); pragma(msg, "bool offset: ", S.e.offsetof); EOF dmd -m32 -c structsize.d --- yields --- struct size: 32u int offset: 0u real offset: 8u bool offset: 24u ---

(OS X 10.7.5, Clang 3.1/XCode 4.6.2, DMD 2.062/Git master)

Is this still broken? From target.c: else if (global.params.isOSX) { realsize = 16; realpad = 6; realalignsize = 16; }

Turns out it is still broken, and is the cause of an impossible assertion failure in ddmd.

It's also broken on linux64 and probably others https://github.com/D-Programming-Language/dmd/pull/3648

Commits pushed to master at https://github.com/D-Programming-Language/dmd https://github.com/D-Programming-Language/dmd/commit/d9e9991584748042f778fe272cd68f95811a261c Fix Issue 10071 - 'real' alignment wrong on OS X 32 bit https://github.com/D-Programming-Language/dmd/commit/647917bd1b988fa49034fe104eea4119fd2812bd Merge pull request #3648 from yebblies/issue10071 Issue 10071 - 'real' alignment wrong on OS X 32 bit