On Wed Sep 10 09:30:37 2008, doughera wrote:
>
> That's another easy one. The test assumes that all platforms have -lrt
> and that all platforms have to link with it for this test. Your system
> clearly doesn't have -lrt, so the link fails. If you just delete the
line
> that adds in -lrt, I'll bet the test succeeds.
>
> Generally, Configure shouldn't be unconditionally adding libraries. A
> better idiom is probably to try without, and then try with only if
> necessary. Something like this:
>
The principle sounds good. I applied the patch and, as predicted, it
DTRT on Linux, as this verbose output for auto::aio on Linux demonstrates.
Unfortunately, it didn't cause AIO to be located on Darwin -- even
though it changed the error message. The handles to the error files
were opened, but the .out, .cco and .ldo files were all empty.
$ ls -ltr test_*
-rw-r--r-- 1 jimk jimk 3424 Sep 10 19:58 test_26632.o
-rw-r--r-- 1 jimk jimk 0 Sep 10 19:58 test_26632.ldo
-rw-r--r-- 1 jimk jimk 0 Sep 10 19:58 test_26632.cco
-rw-r--r-- 1 jimk jimk 1330 Sep 10 19:58 test_26632.c
-rw-r--r-- 1 jimk jimk 0 Sep 10 19:58 test_26632.out
-rwxr-xr-x 1 jimk jimk 18148 Sep 10 19:58 test_26632
Thank you very much.
kid51
auto::aio - Does your platform support AIO...
/usr/bin/gcc -fno-common -no-cpp-precomp -pipe -I/opt/local/include -pipe
-fno-common -Wno-long-double -DHASATTRIBUTE_CONST -DHASATTRIBUTE_DEPRECATED
-DHASATTRIBUTE_MALLOC -DHASATTRIBUTE_NONNULL -DHASATTRIBUTE_NORETURN
-DHASATTRIBUTE_PURE -DHASATTRIBUTE_UNUSED -DHASATTRIBUTE_WARN_UNUSED_RESULT
-falign-functions=16 -fvisibility=hidden -W -Wall -Waggregate-return
-Wcast-align -Wcast-qual -Wchar-subscripts -Wcomment -Wdisabled-optimization
-Wendif-labels -Wextra -Wformat -Wformat-extra-args -Wformat-nonliteral
-Wformat-security -Wformat-y2k -Wimplicit -Wimport -Winit-self -Winline
-Winvalid-pch -Wmissing-braces -Wmissing-field-initializers
-Wno-missing-format-attribute -Wmissing-include-dirs -Wpacked -Wparentheses
-Wpointer-arith -Wreturn-type -Wsequence-point -Wno-shadow -Wsign-compare
-Wstrict-aliasing -Wstrict-aliasing=2 -Wswitch -Wswitch-default -Wtrigraphs
-Wundef -Wunknown-pragmas -Wno-unused -Wvariadic-macros -Wwrite-strings
-Wbad-function-cast -Wdeclaration-after-statement
-Wimplicit-function-declaration -Wimplicit-int -Wmain -Wmissing-declarations
-Wmissing-prototypes -Wnested-externs -Wnonnull -I./include -c test_26632.c
/usr/bin/g++ -undefined dynamic_lookup test_26632.o -o test_26632 -lm
./test_26632
(no)
Setting Configuration Data:
(
verbose => undef,
);
Does your platform support AIO.......................no.
auto::aio - Does your platform support AIO...
cc -pipe -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64
-D_GNU_SOURCE -DHASATTRIBUTE_CONST -DHASATTRIBUTE_DEPRECATED
-DHASATTRIBUTE_MALLOC -DHASATTRIBUTE_NONNULL -DHASATTRIBUTE_NORETURN
-DHASATTRIBUTE_PURE -DHASATTRIBUTE_UNUSED -DHASATTRIBUTE_WARN_UNUSED_RESULT
-falign-functions=16 -fvisibility=hidden -maccumulate-outgoing-args -W -Wall
-Waggregate-return -Wcast-align -Wcast-qual -Wchar-subscripts -Wcomment
-Wdisabled-optimization -Wendif-labels -Wextra -Wformat -Wformat-extra-args
-Wformat-nonliteral -Wformat-security -Wformat-y2k -Wimplicit -Wimport
-Winit-self -Winline -Winvalid-pch -Wmissing-braces
-Wmissing-field-initializers -Wno-missing-format-attribute
-Wmissing-include-dirs -Wpacked -Wparentheses -Wpointer-arith -Wreturn-type
-Wsequence-point -Wno-shadow -Wsign-compare -Wstrict-aliasing
-Wstrict-aliasing=2 -Wswitch -Wswitch-default -Wtrigraphs -Wundef
-Wunknown-pragmas -Wno-unused -Wvariadic-macros -Wwrite-strings
-Wbad-function-cast -Wc++-compat -Wdeclaration-after-statement
-Wimplicit-function-declaration -Wimplicit-int -Wmain -Wmissing-declarations
-Wmissing-prototypes -Wnested-externs -Wnonnull -I./include -c test_15075.c
cc -L/usr/local/lib -Wl,-E test_15075.o -o test_15075 -lnsl -ldl -lm -lcrypt
-lutil -lpthread
test_15075.o: In function `main':
test_15075.c:(.text+0x172): undefined reference to `aio_read64'
collect2: ld returned 1 exit status
(Trying again with -lrt) cc -pipe -I/usr/local/include -D_LARGEFILE_SOURCE
-D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE -DHASATTRIBUTE_CONST
-DHASATTRIBUTE_DEPRECATED -DHASATTRIBUTE_MALLOC -DHASATTRIBUTE_NONNULL
-DHASATTRIBUTE_NORETURN -DHASATTRIBUTE_PURE -DHASATTRIBUTE_UNUSED
-DHASATTRIBUTE_WARN_UNUSED_RESULT -falign-functions=16 -fvisibility=hidden
-maccumulate-outgoing-args -W -Wall -Waggregate-return -Wcast-align -Wcast-qual
-Wchar-subscripts -Wcomment -Wdisabled-optimization -Wendif-labels -Wextra
-Wformat -Wformat-extra-args -Wformat-nonliteral -Wformat-security -Wformat-y2k
-Wimplicit -Wimport -Winit-self -Winline -Winvalid-pch -Wmissing-braces
-Wmissing-field-initializers -Wno-missing-format-attribute
-Wmissing-include-dirs -Wpacked -Wparentheses -Wpointer-arith -Wreturn-type
-Wsequence-point -Wno-shadow -Wsign-compare -Wstrict-aliasing
-Wstrict-aliasing=2 -Wswitch -Wswitch-default -Wtrigraphs -Wundef
-Wunknown-pragmas -Wno-unused -Wvariadic-macros -Wwrite-strings
-Wbad-function-cast -Wc++-compat -Wdeclaration-after-statement
-Wimplicit-function-declaration -Wimplicit-int -Wmain -Wmissing-declarations
-Wmissing-prototypes -Wnested-externs -Wnonnull -I./include -c test_15075.c
cc -L/usr/local/lib -Wl,-E test_15075.o -o test_15075 -lnsl -ldl -lm -lcrypt
-lutil -lpthread -lrt
./test_15075
INFO=42
ok
(yes)
Setting Configuration Data:
(
verbose => undef,
);
Does your platform support AIO......................yes.
