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Re: ld conflict between -r and --gc-sections
- From: Alan Modra <amodra at gmail dot com>
- To: Joel Sherrill <joel dot sherrill at oarcorp dot com>
- Cc: "binutils at sourceware dot org" <binutils at sourceware dot org>, Chris Johns <chrisj at rtems dot org>
- Date: Fri, 11 Mar 2016 10:59:51 +1030
- Subject: Re: ld conflict between -r and --gc-sections
- Authentication-results: sourceware.org; auth=none
- References: <56E1FFB5 dot 8010805 at oarcorp dot com>
On Thu, Mar 10, 2016 at 05:13:57PM -0600, Joel Sherrill wrote:
> i386-rtems4.12-gcc --pipe -B../../../../../.././lib/ -B../../../../../.././pc386/lib/ -specs bsp_specs -qrtems -mtune=i386 -O2 -g -ffunction-sections -fdata-sections -Wall -Wmissing-prototypes -Wimplicit-function-declaration -Wstrict-prototypes -Wnested-externs -qnolinkcmds -nostdlib -r -Wl,--gc-sections -Wl,-Ttext,0x00100000 -o ne2000.rel ne2000_rel-ne2000.o
> /data/home/joel/rtems-4.11-work/tools/4.12/bin/../lib/gcc/i386-rtems4.12/6.0.0/../../../../i386-rtems4.12/bin/ld: gc-sections requires either an entry or an undefined symbol
> collect2: error: ld returned 1 exit status
>
> Is this an x86 specific issue? Or is there something I
> need to tweak in our linker script?
>
> Any other ideas?
User error. -r and --gc-sections requires that you specify -e and/or
-u to specify the root symbol(s) you wish to keep.
--
Alan Modra
Australia Development Lab, IBM