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Subject: Re: Compiling gcc fails while trying to link libgcc
To: Jim Wilson <jimw@sifive.com>
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From: Peter Lamby <dev@peterlamby.de>
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Hi Jim,

removing both pie flags did the trick=2E I removed the
fno-plt too=2E Thanks for your help=2E

I like the default flag for pie=2E This way I don't have to set them
via CFLAGS and have them break my library builds :)

Best
Peter

Am 11=2E Juli 2020 03:35:38 MESZ schrieb Jim Wilson <jimw@sifive=2Ecom>:
>On Thu, Jul 9, 2020 at 1:51 AM Peter Lamby via Gcc-help
><gcc-help@gcc=2Egnu=2Eorg> wrote:
>> export CFLAGS=3D-pipe -march=3Dnative -fstack-protector-strong -fno-plt=
 \
>> -pie -fpie
>
>You can't use -pie when linking a shared library=2E  So this isn't going
>to work=2E  Also the -fno-plt is suspicious=2E  Can you compile a shared
>library without plts?  The -fpie is clearly wrong too=2E  You need to do
>this a different way=2E  Note that gcc has a configure option
>--enable-default-pie which will produce pie output by default, but
>won't pass -pie to the linker with -static, -shared, or -r=2E  And won't
>add -fpie if -fpic was specified=2E
>
>rohan:2242$ gcc -shared -fpic -o tmp=2Eso tmp=2Ec
>rohan:2243$ gcc -shared -fpic -o tmp=2Eso tmp=2Ec -pie
>/usr/lib/gcc/x86_64-linux-gnu/7/=2E=2E/=2E=2E/=2E=2E/x86_64-linux-gnu/Scr=
t1=2Eo: In
>function `_start':
>(=2Etext+0x20): undefined reference to `main'
>collect2: error: ld returned 1 exit status
>rohan:2244$
>
>Jim

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