On Dec 9, 2009, at 4:23 PM, Chris Browne wrote: > This is a C front end for the LLVM compiler... I noticed that it > entered Debian/Unstable today: > > http://packages.debian.org/sid/main/clang > > I thought it would be interesting to see if PostgreSQL compiles with > this, as an alternative compiler that should presumably become more and > more available on Linux et al. (And I suppose that the randomly > selected .sig is supremely apropos!) > > configure blows up here at the following: > > conftest.c:75:28: error: invalid token after top level declarator > extern unsigned int PASCAL accept (unsigned int, void *, void *); > > I suspect there's something about PASCAL that's a problem, as clang is > nominally supposed to be a C compiler ;-). > > I haven't looked deeper, so haven't the remotest idea how deep the issue > lies. > > At any rate, I should poke at this further soon, but if it seems > interesting to others, well, CLANG is now an easy install on some number > of systems!
Clang works for me on MacOS 10.6.2: /Developer/usr/bin/clang --version clang version 1.0.1 (http://llvm.org/svn/llvm-project/cfe/tags/Apple/clang-24 exported) Target: x86_64-apple-darwin10 CC="/Developer/usr/bin/clang" ./configure --prefix=/Users/agentm/pgsql841/ make -j 8 /Users/agentm/pgsql841/initdb -E UTF8 ../data ./pg_ctl -D ../data/ start server starting RD07:bin agentm$ LOG: database system was shut down at 2009-12-09 17:01:51 EST LOG: database system is ready to accept connections LOG: autovacuum launcher started /Users/agentm/pgsql841/psql postgres psql (8.4.1) Type "help" for help. postgres=# select 1; ?column? ---------- 1 (1 row) I do see lots of warnings regarding unsupported compiler flags: clang: warning: argument unused during compilation: '-no-cpp-precomp' clang: warning: argument unused during compilation: '-O2' clang: warning: argument unused during compilation: '-Wall' clang: warning: argument unused during compilation: '-Wmissing-prototypes' clang: warning: argument unused during compilation: '-Wpointer-arith' clang: warning: argument unused during compilation: '-Wdeclaration-after-statement' clang: warning: argument unused during compilation: '-Wendif-labels' clang: warning: argument unused during compilation: '-fno-strict-aliasing' clang: warning: argument unused during compilation: '-fwrapv' and some code-based warnings: print.c:1105:24: warning: field width should have type 'int', but argument has type 'unsigned int' [-Wformat] fprintf(fout, "%-s%*s", hlineptr[line_count].ptr, ^ pl_exec.c:3529:6: warning: expression result unused [-Wunused-value] ItemPointerSetInvalid(&(tmptup.t_self)); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ../../../../src/include/storage/itemptr.h:134:2: note: instantiated from: BlockIdSet(&((pointer)->ip_blkid), InvalidBlockNumber), \ ^ ../../../../src/include/storage/block.h:86:2: note: instantiated from: AssertMacro(PointerIsValid(blockId)), \ ^ ../../../../src/include/postgres.h:675:39: note: instantiated from: #define AssertMacro(condition) ((void)true) ^ ../../../../src/include/c.h:185:15: note: instantiated from: #define true ((bool) 1) You are probably running configure with gcc, no? FYI: with clang: time make (not -j 8) real 1m46.511s user 1m26.295s sys 0m14.639s with gcc: time make real 2m41.934s user 2m20.778s sys 0m17.441s du -h pgsql841gcc/bin/* 52K pgsql841gcc/bin/clusterdb 52K pgsql841gcc/bin/createdb 60K pgsql841gcc/bin/createlang 52K pgsql841gcc/bin/createuser 52K pgsql841gcc/bin/dropdb 60K pgsql841gcc/bin/droplang 52K pgsql841gcc/bin/dropuser 616K pgsql841gcc/bin/ecpg 72K pgsql841gcc/bin/initdb 32K pgsql841gcc/bin/pg_config 28K pgsql841gcc/bin/pg_controldata 36K pgsql841gcc/bin/pg_ctl 280K pgsql841gcc/bin/pg_dump 68K pgsql841gcc/bin/pg_dumpall 36K pgsql841gcc/bin/pg_resetxlog 128K pgsql841gcc/bin/pg_restore 4.6M pgsql841gcc/bin/postgres 4.0K pgsql841gcc/bin/postmaster 340K pgsql841gcc/bin/psql 52K pgsql841gcc/bin/reindexdb 32K pgsql841gcc/bin/vacuumdb du -h pgsql841/bin/* (clang build) 52K pgsql841/bin/clusterdb 52K pgsql841/bin/createdb 60K pgsql841/bin/createlang 52K pgsql841/bin/createuser 48K pgsql841/bin/dropdb 60K pgsql841/bin/droplang 48K pgsql841/bin/dropuser 612K pgsql841/bin/ecpg 72K pgsql841/bin/initdb 28K pgsql841/bin/pg_config 28K pgsql841/bin/pg_controldata 36K pgsql841/bin/pg_ctl 272K pgsql841/bin/pg_dump 68K pgsql841/bin/pg_dumpall 36K pgsql841/bin/pg_resetxlog 124K pgsql841/bin/pg_restore 4.5M pgsql841/bin/postgres 4.0K pgsql841/bin/postmaster 344K pgsql841/bin/psql 52K pgsql841/bin/reindexdb 32K pgsql841/bin/vacuumdb Cheers, M -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
