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From: Tom Lane <tgl@sss.pgh.pa.us>
To: arjunshetty955@gmail.com
cc: pgsql-bugs@lists.postgresql.org
Subject: Re: BUG #17160: PostgreSQL13.4:Build failure with GNU Compiler.
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Comments: In-reply-to PG Bug reporting form <noreply@postgresql.org>
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Date: Wed, 25 Aug 2021 11:40:06 -0400
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PG Bug reporting form <noreply@postgresql.org> writes:
> GCC Build Command: 
> CC=gcc CXX=g++ ../configure --prefix=<pathtoInstall> CFLAGS='-O3
> -march=native -flto' CXXFLAGS='-O3 -march=native -flto'
> build errror:
> /tmp/zic.soWwyC.ltrans0.ltrans.o:<artificial>:(.text.startup+0xf7b): more
> undefined references to `pg_fprintf' follow
> /tmp/zic.soWwyC.ltrans0.ltrans.o: In function `main':
> <artificial>:(.text.startup+0xfe9): undefined reference to `pg_strerror'
> <artificial>:(.text.startup+0x1009): undefined reference to `pg_fprintf'
> collect2: error: ld returned 1 exit status
> make[2]: *** [Makefile:55: zic] Error 1

> without  flto build was success 

Well, there's your answer.  We don't support -flto, and I've not
heard any developers express great interest in making it work.
If somebody were to send in a patch, we might accept it; but
we're not going to treat this as a bug.

			regards, tom lane