From 200ca2e1ee33d53d990bc4485f8ac42dacea8c2d Mon Sep 17 00:00:00 2001
From: Mehdi Chinoune <mehdi.chinoune@hotmail.com>
Date: Fri, 19 Nov 2021 08:14:23 +0100
Subject: [PATCH] pacman: Fix LTO-ing staticlibs

---
 pacman/0021-fix-lto-staticlibs.patch | 29 ++++++++++++++++++++++++++++
 pacman/PKGBUILD                      | 11 +++++++----
 2 files changed, 36 insertions(+), 4 deletions(-)
 create mode 100644 pacman/0021-fix-lto-staticlibs.patch

diff --git a/pacman/0021-fix-lto-staticlibs.patch b/pacman/0021-fix-lto-staticlibs.patch
new file mode 100644
index 00000000..29f5a5fa
--- /dev/null
+++ b/pacman/0021-fix-lto-staticlibs.patch
@@ -0,0 +1,29 @@
+From f578b472aa42851f8a142de20cd8c70664c60248 Mon Sep 17 00:00:00 2001
+From: Mehdi Chinoune <mehdi.chinoune@hotmail.com>
+Date: Sat, 13 Nov 2021 08:27:49 +0100
+Subject: [PATCH] Fix building staticlibs with LTO
+
+Unless `-ffat-lto-objects` get passed to the compiler, It will only generate LTO bytecode.
+
+see:
+https://wiki.ubuntu.com/ToolChain/LTO : Implementation
+https://fedoraproject.org/wiki/Changes/LTOBuildImprovements
+---
+ scripts/libmakepkg/buildenv/lto.sh.in | 5 +++++
+ 1 file changed, 5 insertions(+)
+
+diff --git a/scripts/libmakepkg/buildenv/lto.sh.in b/scripts/libmakepkg/buildenv/lto.sh.in
+index 8e7be66a5..c216a24fa 100644
+--- a/scripts/libmakepkg/buildenv/lto.sh.in
++++ b/scripts/libmakepkg/buildenv/lto.sh.in
+@@ -33,5 +33,10 @@ buildenv_lto() {
+ 	if check_option "lto" "y"; then
+ 		CFLAGS+=" -flto"
+ 		CXXFLAGS+=" -flto"
++		LDFLAGS+=" -flto"
++		if check_option "staticlibs" "y"; then
++			CFLAGS+=" -ffat-lto-objects"
++			CXXFLAGS+=" -ffat-lto-objects"
++		fi
+ 	fi
+ }
diff --git a/pacman/PKGBUILD b/pacman/PKGBUILD
index d8519bcc..ef06a3ee 100644
--- a/pacman/PKGBUILD
+++ b/pacman/PKGBUILD
@@ -4,7 +4,7 @@
 
 pkgname=pacman
 pkgver=6.0.1
-pkgrel=6
+pkgrel=7
 pkgdesc="A library-based package manager with dependency support (MSYS2 port)"
 arch=('i686' 'x86_64')
 url="https://www.archlinux.org/pacman/"
@@ -61,7 +61,8 @@ source=(pacman-${pkgver}::git+https://gitlab.archlinux.org/pacman/pacman.git#com
         0017-Export-CC-and-CXX-variables-explicitly.patch
         0018-pacman.c-handle-cr-on-stdin-as-well.patch
         0019-Add-a-CI-job.patch
-        0020-Strip-static-libraries-as-well.patch)
+        0020-Strip-static-libraries-as-well.patch
+        0021-fix-lto-staticlibs.patch)
 validpgpkeys=('6645B0A8C7005E78DB1D7864F99FFE0FEAE999BD'  # Allan McRae <allan@archlinux.org>
               'B8151B117037781095514CA7BBDFFC92306B1121') # Andrew Gregory (pacman) <andrew@archlinux.org>
 sha256sums=('SKIP'
@@ -88,7 +89,8 @@ sha256sums=('SKIP'
             '5029415842e9c51dd8aa6e380636316cf3f8f2b3ef0ae3f9430658213cb56a2a'
             '0ac2184c8419041f2948517a1c8b66ed740cf0bb1ac5856b384008495317e87b'
             '17604e359cbc1666b678359a5f46b5f822ca0d3a62c6c672b74d45399d78ab5e'
-            '7e1b6df6806a62e69ec072188bb5fdc6575d030e7ac140cee191d0fdf78454a5')
+            '7e1b6df6806a62e69ec072188bb5fdc6575d030e7ac140cee191d0fdf78454a5'
+            '45dadd786e1dd64fda7cff3efcf2f5e0b873b2a80b42a41a21448686b4db0fe6')
 
 apply_git_am_with_msg() {
   for _patch in "$@"
@@ -124,7 +126,8 @@ prepare() {
   0017-Export-CC-and-CXX-variables-explicitly.patch \
   0018-pacman.c-handle-cr-on-stdin-as-well.patch \
   0019-Add-a-CI-job.patch \
-  0020-Strip-static-libraries-as-well.patch
+  0020-Strip-static-libraries-as-well.patch \
+  0021-fix-lto-staticlibs.patch
 }
 
 build() {