From c910570e757305ba4a974b628bcd8fd4278908a7 Mon Sep 17 00:00:00 2001
From: Ed Maste <emaste@FreeBSD.org>
Date: Mon, 1 Mar 2021 12:25:22 -0500
Subject: [PATCH] Use compressed debug in standalone userland debug files by
 default

The compiler supports CFLAGS=-gz=zlib to compress .debug sections in
object files, libraries, and binaries.  Enable it to reduce disk usage
for standalone debug files (and /usr/obj).

Reviewed by:	dim, kevans
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D29002
---
 share/mk/bsd.compiler.mk | 2 +-
 share/mk/bsd.lib.mk      | 5 +++++
 share/mk/bsd.prog.mk     | 4 ++++
 share/mk/bsd.sys.mk      | 2 +-
 4 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/share/mk/bsd.compiler.mk b/share/mk/bsd.compiler.mk
index a52c3968fb0..681f6ffec14 100644
--- a/share/mk/bsd.compiler.mk
+++ b/share/mk/bsd.compiler.mk
@@ -235,7 +235,7 @@ ${X_}COMPILER_FEATURES+=		c++11 c++14
 ${X_}COMPILER_FEATURES+=	c++17
 .endif
 .if ${${X_}COMPILER_TYPE} == "clang"
-${X_}COMPILER_FEATURES+=	retpoline init-all
+${X_}COMPILER_FEATURES+=	compressed-debug retpoline init-all
 .endif
 .if ${${X_}COMPILER_TYPE} == "clang" && ${${X_}COMPILER_VERSION} >= 100000 || \
 	(${${X_}COMPILER_TYPE} == "gcc" && ${${X_}COMPILER_VERSION} >= 80100)
diff --git a/share/mk/bsd.lib.mk b/share/mk/bsd.lib.mk
index aaac0b68d98..0c80dd63d5e 100644
--- a/share/mk/bsd.lib.mk
+++ b/share/mk/bsd.lib.mk
@@ -113,8 +113,13 @@ CXXFLAGS+= -ftrivial-auto-var-init=pattern
 
 .if ${MK_DEBUG_FILES} != "no" && empty(DEBUG_FLAGS:M-g) && \
     empty(DEBUG_FLAGS:M-gdwarf*)
+.if !${COMPILER_FEATURES:Mcompressed-debug}
+CFLAGS+= ${DEBUG_FILES_CFLAGS:N-gz*}
+CXXFLAGS+= ${DEBUG_FILES_CFLAGS:N-gz*}
+.else
 CFLAGS+= ${DEBUG_FILES_CFLAGS}
 CXXFLAGS+= ${DEBUG_FILES_CFLAGS}
+.endif
 CTFFLAGS+= -g
 .endif
 
diff --git a/share/mk/bsd.prog.mk b/share/mk/bsd.prog.mk
index 4f00be19387..437ccf37313 100644
--- a/share/mk/bsd.prog.mk
+++ b/share/mk/bsd.prog.mk
@@ -93,7 +93,11 @@ CFLAGS+=${CRUNCH_CFLAGS}
 .else
 .if ${MK_DEBUG_FILES} != "no" && empty(DEBUG_FLAGS:M-g) && \
     empty(DEBUG_FLAGS:M-gdwarf-*)
+.if !${COMPILER_FEATURES:Mcompressed-debug}
+CFLAGS+= ${DEBUG_FILES_CFLAGS:N-gz*}
+.else
 CFLAGS+= ${DEBUG_FILES_CFLAGS}
+.endif
 CTFFLAGS+= -g
 .endif
 .endif
diff --git a/share/mk/bsd.sys.mk b/share/mk/bsd.sys.mk
index 031d49bbaca..a964cf6e596 100644
--- a/share/mk/bsd.sys.mk
+++ b/share/mk/bsd.sys.mk
@@ -247,7 +247,7 @@ CFLAGS+=	${SSP_CFLAGS}
 
 # Additional flags passed in CFLAGS and CXXFLAGS when MK_DEBUG_FILES is
 # enabled.
-DEBUG_FILES_CFLAGS?= -g
+DEBUG_FILES_CFLAGS?= -g -gz=zlib
 
 # Allow user-specified additional warning flags, plus compiler and file
 # specific flag overrides, unless we've overridden this...