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* [gcc r12-3985] libphobos: Define main function as extern(C) when compiling without D runtime (PR102476)
@ 2021-09-30 16:41 Iain Buclaw
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From: Iain Buclaw @ 2021-09-30 16:41 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:d46a29d919058fb383d19fe35c234fab58286f71
commit r12-3985-gd46a29d919058fb383d19fe35c234fab58286f71
Author: Iain Buclaw <ibuclaw@gdcproject.org>
Date: Fri Sep 24 10:59:47 2021 +0200
libphobos: Define main function as extern(C) when compiling without D runtime (PR102476)
The default supplied main function as read when compiling with `-fmain'
has extern(D) linkage. However this does not work when mixing this
option together with `-fno-druntime'.
PR d/102476
gcc/testsuite/ChangeLog:
* gdc.dg/pr102476.d: New test.
libphobos/ChangeLog:
* libdruntime/__main.di: Define main function as extern(C) when
compiling without D runtime.
Diff:
---
gcc/testsuite/gdc.dg/pr102476.d | 3 +++
libphobos/libdruntime/__main.di | 14 ++++++++++++--
2 files changed, 15 insertions(+), 2 deletions(-)
diff --git a/gcc/testsuite/gdc.dg/pr102476.d b/gcc/testsuite/gdc.dg/pr102476.d
new file mode 100644
index 00000000000..543716eb37d
--- /dev/null
+++ b/gcc/testsuite/gdc.dg/pr102476.d
@@ -0,0 +1,3 @@
+// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102476
+// { dg-do link }
+// { dg-options "-fmain -fno-druntime" }
diff --git a/libphobos/libdruntime/__main.di b/libphobos/libdruntime/__main.di
index 8062bf4d1e8..ab1264b98f1 100644
--- a/libphobos/libdruntime/__main.di
+++ b/libphobos/libdruntime/__main.di
@@ -20,7 +20,17 @@
module __main;
-int main(char[][])
+version (D_BetterC)
{
- return 0;
+ extern (C) int main(int, char**)
+ {
+ return 0;
+ }
+}
+else
+{
+ int main(char[][])
+ {
+ return 0;
+ }
}
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