From b62ec370c8d8289c7fe8892a88c4d65eaab92f5b Mon Sep 17 00:00:00 2001
From: Mikael Urankar <mikael@FreeBSD.org>
Date: Mon, 28 Mar 2022 11:21:02 +0200
Subject: lang/mono5.10,lang/mono: Attempt to fix build on aarch64
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The Roslyn C# compiler has a concurrency problem on aarch64:
https://github.com/mono/mono/issues/7017 (not FreeBSD specific)
so the workaround is to disable parallelism… so the .NET libraries are built
very very slowly

PR:		229710
Approved by:	portmgr (build fix blanket)
---
 lang/mono/Makefile                                 |  1 +
 .../mono/files/extra-patch-aarch64-race-workaround | 26 ++++++++++++++++++++++
 2 files changed, 27 insertions(+)
 create mode 100644 lang/mono/files/extra-patch-aarch64-race-workaround

(limited to 'lang/mono')

diff --git a/lang/mono/Makefile b/lang/mono/Makefile
index 7003f645a52a..227a8cf9d404 100644
--- a/lang/mono/Makefile
+++ b/lang/mono/Makefile
@@ -66,6 +66,7 @@ OPTIONS_SLAVE=	MONOLITE
 .include <bsd.port.options.mk>
 
 .if ${ARCH} == aarch64
+EXTRA_PATCHES=	${FILESDIR}/extra-patch-aarch64-race-workaround
 PLIST=	${.CURDIR}/pkg-plist.aarch64
 .endif
 
diff --git a/lang/mono/files/extra-patch-aarch64-race-workaround b/lang/mono/files/extra-patch-aarch64-race-workaround
new file mode 100644
index 000000000000..d7dd165bd609
--- /dev/null
+++ b/lang/mono/files/extra-patch-aarch64-race-workaround
@@ -0,0 +1,26 @@
+https://bugs.freebsd.org/bugzilla/attachment.cgi?id=195063&action=diff#i/lang/mono/files/extra-patch-aarch64-race-workaround_sec1
+
+Workaround for Roslyn crash: https://github.com/mono/mono/issues/7017
+
+--- mcs/build/profiles/basic.make.orig	2021-11-08 19:42:34.845483000 +0100
++++ mcs/build/profiles/basic.make	2021-11-08 19:43:00.996003000 +0100
+@@ -47,7 +47,7 @@ LIBRARY_COMPILE = $(BOOT_COMPILE)
+ #
+ # Copy from rules.make because I don't know how to unset MCS_FLAGS
+ #
+-USE_MCS_FLAGS = /codepage:$(CODEPAGE) /nologo /noconfig /deterministic $(LOCAL_MCS_FLAGS) $(PLATFORM_MCS_FLAGS) $(PROFILE_MCS_FLAGS) $(MCS_FLAGS)
++USE_MCS_FLAGS = /codepage:$(CODEPAGE) /parallel- /nologo /noconfig /deterministic $(LOCAL_MCS_FLAGS) $(PLATFORM_MCS_FLAGS) $(PROFILE_MCS_FLAGS) $(MCS_FLAGS)
+ 
+ .PHONY: profile-check do-profile-check
+ profile-check:
+--- mcs/build/rules.make.orig	2021-11-08 19:43:05.777570000 +0100
++++ mcs/build/rules.make	2021-11-08 19:43:20.886314000 +0100
+@@ -34,7 +34,7 @@ BUILD_TOOLS_PROFILE = build
+ endif
+ endif
+ 
+-USE_MCS_FLAGS = /codepage:$(CODEPAGE) /nologo /noconfig /deterministic $(LOCAL_MCS_FLAGS) $(PLATFORM_MCS_FLAGS) $(PROFILE_MCS_FLAGS) $(MCS_FLAGS)
++USE_MCS_FLAGS = /codepage:$(CODEPAGE) /parallel- /nologo /noconfig /deterministic $(LOCAL_MCS_FLAGS) $(PLATFORM_MCS_FLAGS) $(PROFILE_MCS_FLAGS) $(MCS_FLAGS)
+ USE_MBAS_FLAGS = /codepage:$(CODEPAGE) $(LOCAL_MBAS_FLAGS) $(PLATFORM_MBAS_FLAGS) $(PROFILE_MBAS_FLAGS) $(MBAS_FLAGS)
+ USE_CFLAGS = $(LOCAL_CFLAGS) $(CFLAGS) $(CPPFLAGS)
+ CSCOMPILE = $(Q_MCS) $(MCS) $(USE_MCS_FLAGS)
-- 
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