#3730: hp2ps: Deviation.c:(.text+0x42b): undefined reference to `sqrt'
-------------------------------+--------------------------------------------
Reporter: slyfox | Owner:
Type: bug | Status: new
Priority: normal | Component: Build System
Version: 6.10.4 | Keywords: autoconf, libm
Os: Linux | Testcase:
Architecture: x86_64 (amd64) | Failure: Building GHC failed
-------------------------------+--------------------------------------------
Start of story is here:
http://bugs.gentoo.org/show_bug.cgi?id=293208
In short:
LIBM variable is wrongly fulfilled by test:
{{{
configure:8389: checking for atan
configure:8389: x86_64-pc-linux-gnu-gcc -o conftest -march=nocona -O2
-pipe -Wl,-O1 conftest.c -lbfd -liberty >&5
conftest.c:109: warning: conflicting types for built-in function 'atan'
configure:8389: $? = 0
}}}
thus test leads to
{{{
LIBM=''
}}}
, then that sole LIBM passed to hp2ps and hp2ps fails, as no -lbfd
-liberty were passed:
{{{
gcc -o hp2ps -O -march=native -O2 -pipe -Wa,--noexecstack
-I../../includes
-Wall AreaBelow.o AuxFile.o Axes.o Curves.o Deviation.o Dimensions.o
Error.o HpFile.o Key.o Main.o Marks.o PsFile.o Reorder.o Scale.o Shade.o
TopTwenty.o TraceElement.o Utilities.o
Deviation.o: In function `Deviation':
Deviation.c:(.text+0x42b): undefined reference to `sqrt'
}}}
AFAIU, before testing for atan presence in -lm ghc should hide his
previously found $LIBS, as LIBM is planned to be used separately.
And separate issue:
hp2ps (and other utils/) does not seem to respect external LDFLAGS
some spam on #ghc (nothing new):
{{{
21:02:36 < trofi> hi, i seem to have found small bunch of bugs in
ghc-6.10.4/ghc-6.12
21:03:32 < trofi> I don't like how LIBM variable is detected. It leads to
bugs like
http://bugs.gentoo.org/show_bug.cgi?id=293208
21:04:41 < trofi> first test finds atan in absolutely unrelated libs:
configure:17837: /usr/bin/gcc -o conftest -g -O2
conftest.c -lbfd -liberty >&5
21:04:49 < trofi> and decides LIBM=''
21:06:13 < trofi> is it standard autotools practice to grind libraries
together?
21:06:36 < trofi> i thought they should be tested separately
21:09:21 < pejo> trofi, so in what library is atan on your OS?
21:10:19 < trofi> libm
21:10:53 < trofi> the problem is autoconf tests not only libm, but libs he
found before: -lbfd and -liberty
21:13:04 < trofi> (at a time)
21:13:12 < pejo> What autoconf tests depends on how you've written your
tests. If it finds atan in either libiberty or libbdf,
then it doesn't need libm, does it?
21:13:32 < trofi> yes it doesn't
21:13:49 < trofi> but ghc build system does not pass those libraries to
build some utils
21:13:55 < trofi> it passes only LIBM
21:14:11 < trofi> which is "obviously" empty
21:14:55 < trofi> it's another bug - when some utils are built there is no
respect of user's LDFLAGS variable
}}}
Sorry for describing bug in reverse order.
Seems like ghc-6.12 is affected too.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3730>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler_______________________________________________
Glasgow-haskell-bugs mailing list
[email protected]
http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
