I'm not sure if gcc-6.3 is weirder than I expected, or if I'm slowly
spreading my own weirdness into the things I touch ;-)
Got the new asymptote-2.39 building once I had reinstated freeglut
in my own build (accidentally kept it commented although libGLU was
present, build failed). All its own tests, and my tests, were good
so I started to measure the build. And failed on the first compile
with an error to the effect that C++11 was needed:
g++ -Wall -DHAVE_CONFIG_H -D_FILE_OFFSET_BITS=64 -DUSEGC -pthread
-DFFTWPP_SINGLE_THREAD -g -O2 -g -O3 -ansi -fno-var-tracking -I.
-I/opt/texlive/2016/include/gc -I/usr/include/gc -o camperror.o -c camperror.cc
In file included from /usr/include/c++/6.3.0/unordered_map:35:0,
from memory.h:22,
from common.h:35,
from camperror.h:16,
from camperror.cc:14:
/usr/include/c++/6.3.0/bits/c++0x_warning.h:32:2: error: #error This file
requires compiler and library support for the ISO C++ 2011 standard. This
support must be enabled with the -std=c++11 or -std=gnu++11 compiler options.
#error This file requires compiler and library support \
^~~~~
In file included from common.h:35:0,
from camperror.h:16,
from camperror.cc:14:
memory.h:153:34: error: ‘hash’ in namespace ‘std’ does not name a template type
typename Hash = EXT::hash<Key>, \
^
and loads more irrelevant messages
On my own builds I pass CFLAGS and CXXFLAGS of -O2 (not everything
uses them, but it saves space on packages which do - no debug
symbols - and I've never been convinced that -O3 is generally
worthwhile).
So, in my initial working build I had
g++ -Wall -DHAVE_CONFIG_H -D_FILE_OFFSET_BITS=64 -DUSEGC -pthread
-DFFTWPP_SINGLE_THREAD -O2 -O2 -fno-var-tracking -I.
-I/opt/texlive/2016/include/gc -I/usr/include/gc -o camperror.o -c
camperror.cc
It appears that the -O2 comes from the CXXFLAGS (I changed them to
-O2, that kept the initial -O2 but lost its preceding -g). But the
-O3 comes from CFLAGS. If I export CFLAGS as '-g -O2' it builds
fine.
ĸen - thinking about changing my name to Nanny Ogg or Magrat Garlick
(not really, that's another Discworld reference).
--
`I shall take my mountains', said Lu-Tze. `The climate will be good
for them.' -- Small Gods
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