From 61a6098f2d43e9a2a1e5e57ae24fd15d2b53ffd5 Mon Sep 17 00:00:00 2001
From: Tomohiro <gpuppur@gmail.com>
Date: Tue, 7 Jul 2020 17:22:10 +0900
Subject: [PATCH] Limit number of error messages from gcc/clang backend
 (#14852)

* Limit number of error messages from backend

* Avoid duplication of -fmax-errors

* make tests/misc/trunner.nim success
---
 config/nim.cfg              | 16 +++++++++-------
 tests/misc/msizeof5.nim.cfg |  5 +++++
 2 files changed, 14 insertions(+), 7 deletions(-)
 create mode 100644 tests/misc/msizeof5.nim.cfg

diff --git a/config/nim.cfg b/config/nim.cfg
index c888fcf89f..d8d3d4f8b1 100644
--- a/config/nim.cfg
+++ b/config/nim.cfg
@@ -167,17 +167,19 @@ path="$lib/pure"
   @end
 @end
 
+gcc.maxerrorsimpl = "-fmax-errors=3"
+
 @if macosx or freebsd or openbsd:
   cc = clang
   tlsEmulation:on
-  gcc.options.always = "-w"
-  gcc.cpp.options.always = "-w -fpermissive"
+  gcc.options.always %= "-w ${gcc.maxerrorsimpl}"
+  gcc.cpp.options.always %= "-w ${gcc.maxerrorsimpl} -fpermissive"
 @elif windows:
-  gcc.options.always = "-w -mno-ms-bitfields"
-  gcc.cpp.options.always = "-w -fpermissive -mno-ms-bitfields"
+  gcc.options.always %= "-w ${gcc.maxerrorsimpl} -mno-ms-bitfields"
+  gcc.cpp.options.always %= "-w ${gcc.maxerrorsimpl} -fpermissive -mno-ms-bitfields"
 @else:
-  gcc.options.always = "-w"
-  gcc.cpp.options.always = "-w -fpermissive"
+  gcc.options.always %= "-w ${gcc.maxerrorsimpl}"
+  gcc.cpp.options.always %= "-w ${gcc.maxerrorsimpl} -fpermissive"
 @end
 
 # Configuration for Objective-C compiler:
@@ -245,7 +247,7 @@ llvm_gcc.options.size = "-Os"
 # Configuration for the LLVM CLang compiler:
 clang.options.debug = "-g"
 clang.cpp.options.debug = "-g"
-clang.options.always = "-w"
+clang.options.always = "-w -ferror-limit=3"
 clang.options.speed = "-O3"
 clang.options.size = "-Os"
 
diff --git a/tests/misc/msizeof5.nim.cfg b/tests/misc/msizeof5.nim.cfg
new file mode 100644
index 0000000000..dc0712a8c3
--- /dev/null
+++ b/tests/misc/msizeof5.nim.cfg
@@ -0,0 +1,5 @@
+# Do not limit number of error messages from backend compiler.
+gcc.options.always %= "${gcc.options.always} -fmax-errors=100"
+clang.options.always %= "${clang.options.always} -ferror-limit=100"
+gcc.cpp.options.always %= "${gcc.cpp.options.always} -fmax-errors=100"
+clang.cpp.options.always %= "${clang.cpp.options.always} -ferror-limit=100"