[ruby-core:86424] [Ruby trunk Bug#14651][Closed] Building 2.5.1p57 with -flto fails on gcc 5.4.0

Issue #14651 has been updated by glebm (Gleb Mazovetskiy).

Status changed from Feedback to Closed

gcc v5.4.0 is the latest gcc in Ubuntu 16.04 LTS.

I've upgraded to Ubuntu 17.10 and there it is currently:

~~~
gcc version 7.2.0 (Ubuntu 7.2.0-8ubuntu3.2) 
~~~

With this new gcc version, compiling with `-flto` works.

As the new Ubuntu LTS release is just around the corner, perhaps it no longer makes sense to support gcc v5.4.


----------------------------------------
Bug #14651: Building 2.5.1p57 with -flto fails on gcc 5.4.0
https://bugs.ruby-lang.org/issues/14651#change-71359

* Author: glebm (Gleb Mazovetskiy)
* Status: Closed
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: ruby 2.5.1p57 (2018-03-29 revision 63029) [x86_64-linux]
* Backport: 2.3: UNKNOWN, 2.4: UNKNOWN, 2.5: UNKNOWN
----------------------------------------
~~~ bash
cflags='-march=native -flto -pipe' rvm reinstall 2.5.1 --disable-binary
~~~


~~~ bash
gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/5/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 5.4.0-6ubuntu1~16.04.9' --with-bugurl=file:///usr/share/doc/gcc-5/README.Bugs --enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-5 --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-libmpx --enable-plugin --with-system-zlib --disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-5-amd64/jre --enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-5-amd64 --with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-5-amd64 --with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --enable-objc-gc --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 5.4.0 20160609 (Ubuntu 5.4.0-6ubuntu1~16.04.9) 
~~~

make.log attached, relevant error message:

~~~ bash
In file included from bigdecimal.c:13:0:
bigdecimal.h:139:1: error: static declaration of ‘rb_sym2str’ follows non-static declaration
 rb_sym2str(VALUE sym)
 ^
In file included from bigdecimal.h:14:0,
                 from bigdecimal.c:13:
../.././include/ruby/ruby.h:1735:7: note: previous declaration of ‘rb_sym2str’ was here
 VALUE rb_sym2str(VALUE);
       ^
bigdecimal.c:108:1: error: static declaration of ‘rb_rational_num’ follows non-static declaration
 rb_rational_num(VALUE rat)
 ^
In file included from ../.././include/ruby/ruby.h:2040:0,
                 from bigdecimal.h:14,
                 from bigdecimal.c:13:
../.././include/ruby/intern.h:171:7: note: previous declaration of ‘rb_rational_num’ was here
 VALUE rb_rational_num(VALUE rat);
       ^
bigdecimal.c: In function ‘rb_rational_num’:
bigdecimal.c:113:50: error: macro "rb_funcall" requires 4 arguments, but only 2 given
     return rb_funcall(rat, rb_intern("numerator"));
                                                  ^
bigdecimal.c:113:12: warning: return makes integer from pointer without a cast [-Wint-conversion]
     return rb_funcall(rat, rb_intern("numerator"));
            ^
bigdecimal.c: At top level:
bigdecimal.c:120:1: error: static declaration of ‘rb_rational_den’ follows non-static declaration
 rb_rational_den(VALUE rat)
 ^
In file included from ../.././include/ruby/ruby.h:2040:0,
                 from bigdecimal.h:14,
                 from bigdecimal.c:13:
../.././include/ruby/intern.h:172:7: note: previous declaration of ‘rb_rational_den’ was here
 VALUE rb_rational_den(VALUE rat);
       ^
bigdecimal.c: In function ‘rb_rational_den’:
bigdecimal.c:125:52: error: macro "rb_funcall" requires 4 arguments, but only 2 given
     return rb_funcall(rat, rb_intern("denominator"));
                                                    ^
bigdecimal.c:125:12: warning: return makes integer from pointer without a cast [-Wint-conversion]
     return rb_funcall(rat, rb_intern("denominator"));
~~~

---Files--------------------------------
make.log (36.7 KB)
mkmf.log (21.2 KB)


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