Skip to content

Conversation

@telamonian
Copy link

@telamonian telamonian commented Sep 17, 2020

Fixes #269

The intel C compiler defaults to -std=gnu98, which apparently causes problems with recent cpython source. Judging by the existing code in CMakeLists.txt and this issue on the core cpython repo, somewhere around cpy3.6 cpython moved on to C99.

This PR ensures that if intel compilers are being used on cpy>=3.6 source, the -std=C99 flag will be added

The intel C compiler [defaults to `-std=gnu98`](https://software.intel.com/content/www/us/en/develop/documentation/cpp-compiler-developer-guide-and-reference/top/compiler-reference/compiler-options/compiler-option-details/language-options/std-qstd.html#std-qstd_GUID-338F4C2A-560C-4338-8ACF-C4B022A7C865), which apparently causes problems with recent cpython source. Judging by the existing code in `CMakeLists.txt` and [this issue on the core cpython repo](python/cpython#568), somewhere around cpy3.6 cpython moved on to C99.

This PR ensures that if intel compilers are being used on cpy>=3.6 source, the `-std=C99` flag will be added
@telamonian
Copy link
Author

@certik It's been a while since I've had personal access to the intel compiler suite, so I have no actual way of testing this PR out myself. However, I'm pretty sure it will solve your problem? Can you please try it out and let us know?

@certik
Copy link

certik commented Sep 17, 2020

Thanks, I'll give it a shot soon!

@concatime
Copy link
Contributor

concatime commented Nov 17, 2020

Why not simply add set(CMAKE_C_STANDARD 99), independently of the compiler used ?

@concatime
Copy link
Contributor

Or a simple patch:

diff --git a/Parser/grammar.c b/Parser/grammar.c
index 75fd5b9cde..1a4d585026 100644
--- a/Parser/grammar.c
+++ b/Parser/grammar.c
@@ -33,8 +33,9 @@ freegrammar(grammar *g)
 {
     int i;
     for (i = 0; i < g->g_ndfas; i++) {
+        int j;
         free(g->g_dfa[i].d_name);
-        for (int j = 0; j < g->g_dfa[i].d_nstates; j++)
+        for (j = 0; j < g->g_dfa[i].d_nstates; j++)
             PyObject_FREE(g->g_dfa[i].d_state[j].s_arc);
         PyObject_FREE(g->g_dfa[i].d_state);
     }

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

Labels

None yet

Development

Successfully merging this pull request may close these issues.

Fails to compile with icc

3 participants