579200 – dev-libs/crypto++ wrongly uses CXXFLAGS+=-march=native

Bug 579200 - dev-libs/crypto++ wrongly uses CXXFLAGS+=-march=native

Summary: dev-libs/crypto++ wrongly uses CXXFLAGS+=-march=native

Status:	RESOLVED FIXED

Alias:	None

Product:	Gentoo Linux
Classification:	Unclassified
Component:	[OLD] Library (show other bugs)
Hardware:	All Linux

Importance:	Normal normal
Assignee:	Crypto team [DISABLED]

URL:
Whiteboard:
Keywords:

Depends on:
Blocks:

Reported:	2016-04-07 05:34 UTC by Marshall McMullen
Modified:	2016-04-07 20:40 UTC (History)
CC List:	1 user (show)

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Package list:
Runtime testing required:	---

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Description Marshall McMullen 2016-04-07 05:34:37 UTC

In the GNUMakefile provided with dev-libs/crypto++-5.6.2, there's this line of code:

{code}
ifneq ($(GCC42_OR_LATER),0)
ifeq ($(UNAME),Darwin)
CXXFLAGS += -arch x86_64 -arch i386
else
CXXFLAGS += -march=native
endif
endif
{code}

In my case I was using compiler 4.8.1 and this thus forced me to get -march=native. This caused great grief since the build machine I was on was a slightly different CPU family which caused any binary calling into crypto++ to receive a SIGILL (Illegal Instruction) and crash.

I found a similar freeBSD bug report on this here: 

http://lists.freebsd.org/pipermail/freebsd-ports-bugs/2014-January/270075.html

Comment 1 Alon Bar-Lev (RETIRED) gentoo-dev

2016-04-07 20:40:23 UTC

Good one!
Thanks!