This looks like a bug, please file an llvm PR. The offending code seems to be
createUniqueEntity() in lib/Support/Unix/Path.inc, which does... something.
Something weird and convoluted that seems to try to implement mkstemp() /
mkdtemp() in an incomprehensible way.
David
On 13 Feb 2014, at 17:33, Marcel Moolenaar mar...@xcllnt.net wrote:
Guys,
I'm running into a build break that relates to the temporary files
that LLVM creates:
svl-junos-j019% cc --version
FreeBSD clang version 3.3 (tags/RELEASE_33/final 183502) 20130610
Target: arm--freebsd10.0-gnueabi
Thread model: posix
On a build machine /tmp/b is a directory and created by user X.
I am doing a buildworld on that machine as user Y (Y=marcelm) and
I don't have permissions in /tmp/b. The build gets to usr.bin/awk
and it has a source file called b.c
The build fails with:
--- b.o ---
cc -O -pipe -DHAS_ISBLANK -I.
-I/b/marcelm/buildbot/FreeBSD_arm_arm/build/usr.bin/awk/../../contrib/one-true-awk
-DFOPEN_MAX=64 -std=gnu99 -Qunused-arguments -Wsystem-headers -Werror
-Wno-pointer-sign -Wno-empty-body -Wno-string-plus-int
-Wno-tautological-compare -Wno-unused-value -Wno-parentheses-equality
-Wno-unused-function -Wno-enum-conversion -Wno-switch -Wno-switch-enum
-Wno-knr-promoted-parameter -Wno-parentheses -c
/b/marcelm/buildbot/FreeBSD_arm_arm/build/usr.bin/awk/../../contrib/one-true-awk/b.c
cc: error: unable to make temporary file: /tmp/b: can't make unique filename:
Permission denied
*** [b.o] Error code 1
Running truss shows:
access(/b/marcelm/buildbot/FreeBSD_arm_arm/build/usr.bin/awk/../../contrib/one-true-awk/b.c,0)
= 0 (0x0)
stat(/tmp/b,{ mode=drwxr-xr-x ,inode=235520,size=512,blksize=16384 }) = 0
(0x0)
open(/dev/random,O_RDONLY,00)= 3 (0x3)
read(3,\M^S\M^H\^S65S'*\M-T\M-r\^A9\M-K...,128) = 128 (0x80)
close(3) = 0 (0x0)
stat(/tmp/b,{ mode=drwxr-xr-x ,inode=235520,size=512,blksize=16384 }) = 0
(0x0)
open(/tmp/b/B8owDb,O_RDWR|O_CREAT|O_EXCL,0600) ERR#13 'Permission denied'
Now, if I compile another file, I get:
access(/b/marcelm/buildbot/FreeBSD_arm_arm/build/usr.bin/awk/../../contrib/one-true-awk/lex.c,0)
= 0 (0x0)
stat(/tmp/lex,0x7fffbab0)ERR#2 'No such file or
directory'
open(/dev/random,O_RDONLY,00)= 3 (0x3)
read(3,\^F\r\M-J\M-5Z\M-fK\^E\M-2'\M-1...,128) = 128 (0x80)
close(3) = 0 (0x0)
stat(/tmp,{ mode=drwxrwxrwt ,inode=2,size=9728,blksize=16384 }) = 0 (0x0)
open(/tmp/lex-pDQnPA,O_RDWR|O_CREAT|O_EXCL,0600) = 3 (0x3)
close(3) = 0 (0x0)
So for some reason when /tmp/basename exists and is a directory, then the
compiler wants to create a temporary file underneath that directory. That
looks like a bug to me. Do people concur and thus shall I file a PR?
--
Marcel Moolenaar
mar...@xcllnt.net
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