Bug#796076: gcc-5: undefined reference errors with extern __inline__ (regression)
On 08/20/2015 02:39 AM, Vincent Lefevre wrote:
On 2015-08-19 17:36:47 +0200, Matthias Klose wrote:
On 08/19/2015 10:48 AM, Vincent Lefevre wrote:
extern __inline__ fn1() { fn2(); }
main() {}
not a bug. if you want to keep gnu89 inline semantics, build using
-fgnu89-inline.
Well, I haven't chosen the gnu89 inline semantics. This comes from
gmp.h (GMP 4.1). So, that's actually a bug in GMP, which uses this
semantics unconditionally with all GCC versions. Fortunately,
GMP 4.1 is very old and this has been improved in later GMP
versions.
see https://gcc.gnu.org/gcc-5/porting_to.html
__attribute__ ((gnu_inline)) should be your fix.
Bug#796076: gcc-5: undefined reference errors with extern __inline__ (regression)
On 2015-08-20 13:19:23 +0200, Matthias Klose wrote: see https://gcc.gnu.org/gcc-5/porting_to.html __attribute__ ((gnu_inline)) should be your fix. Yes, this has been fixed in GMP 4.2, but the (very old) GMP 4.1 branch will never be fixed. This is a bit annoying, as for MPFR up to 3.1.x, we claim that we still support GMP 4.1.x, which is true, but this bug makes the MPFR build fail with a misleading error message in configure (we also suggest in the error message to look at config.log, where one can find a bit more about the real reason of the failure, but this doesn't give an idea of what is wrong exactly). I have improved the gmp.h testing in the MPFR configure so that one gets a more meaningful error if gmp.h isn't usable at all (+ mentioning this incompatibility between GMP 4.1.x and GCC 5, in the MPFR 3.1 branch). -- Vincent Lefèvre vinc...@vinc17.net - Web: https://www.vinc17.net/ 100% accessible validated (X)HTML - Blog: https://www.vinc17.net/blog/ Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)
Bug#796076: gcc-5: undefined reference errors with extern __inline__ (regression)
On 2015-08-19 17:36:47 +0200, Matthias Klose wrote:
On 08/19/2015 10:48 AM, Vincent Lefevre wrote:
extern __inline__ fn1() { fn2(); }
main() {}
not a bug. if you want to keep gnu89 inline semantics, build using
-fgnu89-inline.
Well, I haven't chosen the gnu89 inline semantics. This comes from
gmp.h (GMP 4.1). So, that's actually a bug in GMP, which uses this
semantics unconditionally with all GCC versions. Fortunately,
GMP 4.1 is very old and this has been improved in later GMP
versions.
--
Vincent Lefèvre vinc...@vinc17.net - Web: https://www.vinc17.net/
100% accessible validated (X)HTML - Blog: https://www.vinc17.net/blog/
Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)
Bug#796076: gcc-5: undefined reference errors with extern __inline__ (regression)
Package: gcc-5
Version: 5.2.1-15
Severity: important
On the following C code obtained with creduce (on a code obtained
when I wanted to test MPFR 3.1.3 against GMP 4.1.4):
extern __inline__ fn1() { fn2(); }
main() {}
I get the following error with gcc-5:
$ gcc-5 -w ct.i
/tmp/ccFWIDKK.o: In function `fn1':
ct.i:(.text+0xa): undefined reference to `fn2'
collect2: error: ld returned 1 exit status
No such problem with gcc-4.9, gcc-4.8 and gcc-4.7.
-- System Information:
Debian Release: stretch/sid
APT prefers unstable
APT policy: (500, 'unstable'), (500, 'testing'), (500, 'stable'), (1,
'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 4.1.0-1-amd64 (SMP w/8 CPU cores)
Locale: LANG=POSIX, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: sysvinit (via /sbin/init)
Versions of packages gcc-5 depends on:
ii binutils 2.25.1-1
ii cpp-5 5.2.1-15
ii gcc-5-base5.2.1-15
ii libc6 2.19-19
ii libcc1-0 5.2.1-15
ii libgcc-5-dev 5.2.1-15
ii libgcc1 1:5.2.1-15
ii libgmp10 2:6.0.0+dfsg-7
ii libisl13 0.14-2
ii libmpc3 1.0.3-1
ii libmpfr4 3.1.3-1
ii libstdc++65.2.1-15
ii zlib1g1:1.2.8.dfsg-2+b1
Versions of packages gcc-5 recommends:
ii libc6-dev 2.19-19
Versions of packages gcc-5 suggests:
pn gcc-5-doc none
ii gcc-5-locales 5.2.1-15
ii gcc-5-multilib5.2.1-15
pn libasan2-dbg none
ii libatomic1-dbg5.2.1-15
ii libcilkrts5-dbg 5.2.1-15
ii libgcc1-dbg 1:5.2.1-15
ii libgomp1-dbg 5.2.1-15
ii libitm1-dbg 5.2.1-15
ii liblsan0-dbg 5.2.1-15
pn libmpx0-dbg none
ii libquadmath0-dbg 5.2.1-15
ii libtsan0-dbg 5.2.1-15
ii libubsan0-dbg 5.2.1-15
-- no debconf information
