linux-kernel - [PATCH 1/5] try generic compiler name "cc" before falling back to "gcc".

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Message-ID: <63c2936e-6bc7-67e3-eaf3-0123333381f8@landley.net>
Date:   Tue, 21 Feb 2023 14:55:10 -0600
From:   Rob Landley <rob@...dley.net>
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Cc:     Masahiro Yamada <masahiroy@...nel.org>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Nicolas Schier <nicolas@...sle.eu>, Tom Rix <trix@...hat.com>,
        linux-kbuild@...r.kernel.org, llvm@...ts.linux.dev
Subject: [PATCH 1/5] try generic compiler name "cc" before falling back to
 "gcc".

Distros like debian install the generic "cc" name for both gcc and clang,
and the plumbing already does CC_VERSION_TEXT to include Makefile.clang.

Previously: https://lkml.iu.edu/hypermail/linux/kernel/2202.0/01505.html
Signed-off-by: Rob Landley <rob@...dley.net>
---
 Makefile | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index 3f6628780eb2..0ac57ae3b45f 100644
--- a/Makefile
+++ b/Makefile
@@ -456,7 +456,7 @@ endif
 HOSTCC	= $(LLVM_PREFIX)clang$(LLVM_SUFFIX)
 HOSTCXX	= $(LLVM_PREFIX)clang++$(LLVM_SUFFIX)
 else
-HOSTCC	= gcc
+HOSTCC	:= $(shell cc --version >/dev/null 2>&1 && echo cc || echo gcc)
 HOSTCXX	= g++
 endif
 HOSTRUSTC = rustc
@@ -503,7 +503,8 @@ OBJDUMP		= $(LLVM_PREFIX)llvm-objdump$(LLVM_SUFFIX)
 READELF		= $(LLVM_PREFIX)llvm-readelf$(LLVM_SUFFIX)
 STRIP		= $(LLVM_PREFIX)llvm-strip$(LLVM_SUFFIX)
 else
-CC		= $(CROSS_COMPILE)gcc
+CC		:= $(CROSS_COMPILE)$(shell $(CROSS_COMPILE)cc --version \
+			>/dev/null 2>&1 && echo cc || echo gcc)
 LD		= $(CROSS_COMPILE)ld
 AR		= $(CROSS_COMPILE)ar
 NM		= $(CROSS_COMPILE)nm