Обсуждение: BUG #17160: PostgreSQL13.4:Build failure with GNU Compiler.

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BUG #17160: PostgreSQL13.4:Build failure with GNU Compiler.

От
PG Bug reporting form
Дата:
The following bug has been logged on the website:

Bug reference:      17160
Logged by:          arjun shetty
Email address:      arjunshetty955@gmail.com
PostgreSQL version: 13.4
Operating system:   Ubuntu 20.04.1 LTS
Description:

Observed build errors on PostgreSQLv13.4/PostgreSQLv14beta2 with GNU
Compiler.

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 
-flto=thin supported for clang(llvm) .
GCC supports LTO(can use normal flto or GCC has an equivalent to Thin LTO:
WHOle Program optimizeR (WHOPR) i.e like -flto=fwhopr )

Re: BUG #17160: PostgreSQL13.4:Build failure with GNU Compiler.

От
Tom Lane
Дата:
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