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38 lines
1.2 KiB
38 lines
1.2 KiB
From ca4b7338836edb7325c82f86dccdeb4808cb4a89 Mon Sep 17 00:00:00 2001
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From: Mark Pizzolato <mark@infocomm.com>
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Date: Wed, 29 Jan 2020 11:39:36 -0800
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Subject: [PATCH] makefile: Force gcc/clang -fcommon to address future gcc
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-fno-common default
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as reported and discussed in #794
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---
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makefile | 7 +++++++
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1 file changed, 7 insertions(+)
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--- a/makefile
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+++ b/makefile
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@@ -506,9 +506,13 @@ else
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ifneq (3,$(GCC_MAJOR_VERSION))
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ifeq (,$(GCC_OPTIMIZERS_CMD))
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GCC_OPTIMIZERS_CMD = $(GCC) --help=optimizers
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+ GCC_COMMON_CMD = $(GCC) --help=common
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endif
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GCC_OPTIMIZERS = $(shell $(GCC_OPTIMIZERS_CMD))
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endif
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+ ifneq (,$(GCC_COMMON_CMD))
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+ GCC_OPTIMIZERS += $(shell $(GCC_COMMON_CMD))
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+ endif
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ifneq (,$(findstring $(GCC_VERSION),$(LTO_EXCLUDE_VERSIONS)))
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NO_LTO = 1
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endif
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@@ -530,6 +534,9 @@ else
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ifneq (,$(findstring -fstrict-overflow,$(GCC_OPTIMIZERS)))
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CFLAGS_O += -fno-strict-overflow
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endif
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+ ifneq (,$(findstring -fcommon,$(GCC_OPTIMIZERS))$(findstring -fno-common,$(GCC_OPTIMIZERS)))
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+ CFLAGS_O += -fcommon
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+ endif
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ifeq (,$(NO_LTO))
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ifneq (,$(findstring -flto,$(GCC_OPTIMIZERS)))
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CFLAGS_O += -flto -fwhole-program
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