Re: MonetDB: Jan2014 - configure.ag: revised way to determine compil...

5 Mar 2014

      ...
configure:6863: checking compiler type & version
configure:6890: result: clang-Apple LLVM version 5.0 (clang-500.2.79) (based
on LLVM 3.3svn)
hm, strange, this means that the "grep&sed-magic" to extract the version number does not work in this case;

in configure[.ag] we do

        gcc_ver="`$CC -v 2>&1 | grep -w '[[Vv]]ersion [[0-9]]\+\.[[0-9]]\+' | sed 's|^.*[[Vv]]ersion \([[0-9]]\+\(\.[[0-9]]\+\)\+\).*$|\1|'`"
        CC_ver="clang-$gcc_ver"

and this appears to work for clang 3.3 on Linux.

Also, it work "by hand" for me:

echo 'Apple LLVM version 5.0 (clang-500.2.79) (based on LLVM 3.3svn)' | grep -w '[Vv]ersion [0-9]\+\.[0-9]\+' | sed 's|^.*[Vv]ersion \([0-9]\+\(\.[0-9]\+\)\+\).*$|\1|'
5.0

But this should not be a problem (for now), since all relevant checks only
rely on whether we reconized it's clang (which we did), rather than knowing
the exact clang version.
...
No mention of "recognized", but I did find the following:
Good, this means that out configure did "recognize" the compiler
(i.e., it does not warn about not recognizing it)
...
configure:18985: checking whether we have pthread support
configure:18992: result: yes:   -pthread
This means that we indeed did recognized clang and thus set only 
PTHREAD_LIBS="-pthread", but not PTHREAD_INCS="-pthread".
Setting PTHREAD_LIBS="-pthread" is required for clang 3.3 on Linux.

This also means that setting PTHREAD_LIBS="-pthread" is "still too much"
(at least) for clang 5.0 on Mac OSX Mavericks.

Thus, we need to debug and fix the clang version number extraction (see above),
and then disable both PTHREAD_INCS="-pthread" & PTHREAD_LIBS="-pthread"
(only) for clang-5.0 .

Maybe someone else has any idea, which the clang version number extraction
(see above) does not work for Dimitar (i.e., on Mac OSX Mavericks)?

For the time being, maybe you can try the attached patch for configure.ag ?

Stefan
...
On 2014-Mar-05, at 13:46 , Stefan Manegold  wrote:
...
What does your configure output say,
in particular look for "compiler type & version" and "recognized"
Stefan
----- Original Message -----
...
Unfortunately I still get an error even with the latest changes:
libtool: link: gcc -g -I/opt/local/include -Werror -Wall -Wextra -W
-Werror-implicit-function-declaration -Wpointer-arith
-Wdeclaration-after-statement -Wformat=2 -Wno-format-nonliteral
-Winit-self
-Winvalid-pch -Wmissing-declarations -Wmissing-format-attribute
-Wmissing-prototypes -Wold-style-definition -Wpacked -Wunknown-pragmas
-Wvariadic-macros -fstack-protector-all -Wstack-protector
-Wmissing-include-dirs -Wunreachable-code -D_REENTRANT -o
.libs/stethoscope
stethoscope.o  ./.libs/libmcutil.a -L/opt/local/lib
../mapilib/.libs/libmapi.dylib
/Users/dnedev/monetdb/MonetDB/BUILD/common/stream/.libs/libstream.dylib
../../common/stream/.libs/libstream.dylib -lz -lbz2 -lssl -lcrypto -liconv
-lcurl -latomic_ops
clang: error: argument unused during compilation: '-pthread'
clang: error: argument unused during compilation: '-pthread'
make[5]: *** [tomograph] Error 1
On 2014-Mar-05, at 10:02 , Dimitar Nedev  wrote:
...
https://en.wikipedia.org/wiki/Xcode#Toolchain_Versions
+-------+---------+-------+---------+---------+--------------+------------+---------------------------------------------+
| Xcode | cctools | ld64  | GCC 4.0 | GCC 4.2 | LLVM-GCC 4.2 |    LLVM
| |
| Apple LLVM/ Apple Clang           |
+-------+---------+-------+---------+---------+--------------+------------+---------------------------------------------+
| 4.6.3 |  ?      |  ?    | -       | -       | 5658         | 2336.11.00
| |
| 4.2 (clang-425.0.28) (based on LLVM 3.2svn) |
| 5.0.0 | 846.2.1 | 224.1 | -       | -       | -            | -
| |
| 5.0 (clang-500.2.75) (based on LLVM 3.3svn) |
| 5.0.1 | 846.2.4 | 224.1 | -       | -       | -            | -
| |
| 5.0 (clang-500.2.79) (based on LLVM 3.3svn) |
| 5.0.2 | 846.2.4 | 224.1 | -       | -       | -            | -
| |
| 5.0 (clang-500.2.79) (based on LLVM 3.3svn) |
+-------+---------+-------+---------+---------+--------------+------------+---------------------------------------------+
On 2014-Mar-05, at 09:27 , Fabian Groffen  wrote:
...
On 05-03-2014 08:25:38 +0100, Stefan Manegold wrote:
...
Changeset: 36afc568f849 for MonetDB
URL: http://dev.monetdb.org/hg/MonetDB?cmd=changeset;node=36afc568f849
Modified Files:
  configure.ag
Branch: Jan2014
Log Message:
configure.ag: revised way to determine compiler type (gcc vs. clang vs.
icc):
in particular do not (only) rely on the result of AC_PROG_CC() (i.e.,
$GCC)
or the name of the call;
background is that on Mac OSX Mavericks, Apple prestends that their
clang
were gcc ...
FYI: they were pretending they had a GCC since OSX Lion.
Fabian
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| Stefan.Manegold@CWI.nl | DB Architectures   (DA) |
| www.CWI.nl/~manegold/  | Science Park 123 (L321) |
| +31 (0)20 592-4212     | 1098 XG Amsterdam  (NL) |
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-- 
| Stefan.Manegold@CWI.nl | DB Architectures   (DA) |
| www.CWI.nl/~manegold/  | Science Park 123 (L321) |
| +31 (0)20 592-4212     | 1098 XG Amsterdam  (NL) |