From: Andi Kleen <ak@gcc.gnu.org>
Date: Tue, 30 Jul 2024 16:39:48 +0000 (-0700)
Subject: Add a bootstrap-native build config
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=57f8cc4601454c797d0857201b26f9a7c2893933;p=thirdparty%2Fgcc.git

Add a bootstrap-native build config

... that uses -march=native -mtune=native to build a compiler optimized
for the host.

config/ChangeLog:

	* bootstrap-native.mk: New file.

gcc/ChangeLog:

	* doc/install.texi: Document bootstrap-native.
---

diff --git a/config/bootstrap-native.mk b/config/bootstrap-native.mk
new file mode 100644
index 00000000000..a4a3d859408
--- /dev/null
+++ b/config/bootstrap-native.mk
@@ -0,0 +1 @@
+BOOT_CFLAGS := -march=native -mtune=native $(BOOT_CFLAGS)
diff --git a/gcc/doc/install.texi b/gcc/doc/install.texi
index 1af0082ed77..ff083360be2 100644
--- a/gcc/doc/install.texi
+++ b/gcc/doc/install.texi
@@ -3144,6 +3144,13 @@ Removes any @option{-O}-started option from @code{BOOT_CFLAGS}, and adds
 @itemx @samp{bootstrap-Og}
 Analogous to @code{bootstrap-O1}.
 
+@item @samp{bootstrap-native}
+@itemx @samp{bootstrap-native}
+Optimize the compiler code for the build host, if supported by the
+architecture. Note this only affects the compiler, not the targeted
+code. If you want the later, choose options suitable to the target you
+are looking for. For example @samp{--with-cpu} would be a good starting point.
+
 @item @samp{bootstrap-lto}
 Enables Link-Time Optimization for host tools during bootstrapping.
 @samp{BUILD_CONFIG=bootstrap-lto} is equivalent to adding