"expr: syntax error" on jdk9/dev build

[Magnus Ihse Bursie]

Volker,

Thanks for the great analysis! Your trivial fix seems reasonable. I 
opened https://bugs.openjdk.java.net/browse/JDK-8141416 to track this. 
It's up for grabs to add that line. :) (Otherwise I'll fix it when I 
have the time.)

/Magnus

On 2015-11-04 08:49, Volker Simonis wrote:
> Hi Johnathan,
>
> this is a known problem - at least to me :)
>
> It is caused by a peculiarity of the gcc version on Ubuntu where "gcc
> -dumpversion" doesn't print a micro-version:
>
> Ubuntu:
> $ gcc -dumpversion
> 4.6
>
> Any other Linux:
> $ gcc -dumpversion
> 4.8.3
>
> This "feature" is tracked under
> https://bugs.launchpad.net/ubuntu/+source/gcc-4.8/+bug/1360404 and has
> been fixed for gcc 4.9 but won't be fixed for older versions of gcc.
>
> In hotspot/make/linux/makefiles/gcc.make we parse the micro-version of
> gcc and use it in the following way:
>
> CC_VER_MICRO := $(shell $(CC) -dumpversion | sed 's/egcs-//' | cut -d'.' -f3)
>
> ifeq ($(shell expr $(CC_VER_MAJOR) = 4 \& $(CC_VER_MINOR) = 1 \&
> $(CC_VER_MICRO) = 1), 1)
>    $(error "GCC $(CC_VER_MAJOR).$(CC_VER_MINOR).$(CC_VER_MICRO) not
> supported because of
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=27724")
> endif
>
> The shell expression results in a syntax error if $(CC_VER_MICRO)
> because it expaands to something like "expr 4 = 4 & 3 = 1 & = 1"
>
> I haven't fixed it until now because it does no harm. The
> corresponding check is for gcc 4.1.1 but the affected Ubuntu gcc
> compilers are 4.6, 4.7 and 4.8.
>
> A trivial fix would be to set CC_VER_MICRO to "0" by default.
>
> Regards,
> Volker
>
>
> On Tue, Nov 3, 2015 at 10:45 PM, Jonathan Gibbons
> <jonathan.gibbons at oracle.com> wrote:
>> I'm seeing a bunch of "syntax error"s on an otherwise successful build of
>> jdk9/dev.
>>
>> This is on Ubuntu Linux, 14.04.
>>
>> Is this a known problem; should I be worried?
>>
>> -- Jon
>>
>> Creating support/jce/policy/unlimited/US_export_policy.jar
>> Creating support/jce/policy/limited/local_policy.jar
>> Creating support/jce/policy/unlimited/local_policy.jar
>> Generating java.security
>> expr: syntax error
>> expr: syntax error
>> expr: syntax error
>> expr: syntax error
>> expr: syntax error
>> expr: syntax error
>> Note: Some input files use unchecked or unsafe operations.
>> Note: Recompile with -Xlint:unchecked for details.
>> Warning: generation and use of skeletons and static stubs for JRMP
>> is deprecated. Skeletons are unnecessary, and static stubs have
>> been superseded by dynamically generated stubs. Users are
>> encouraged to migrate away from using rmic to generate skeletons and static
>> stubs. See the documentation for java.rmi.server.UnicastRemoteObject.
>> expr: syntax error
>> expr: syntax error
>> expr: syntax error
>> All done.
>> Generating linux_amd64_docs/jvmti.html
>> Creating libverify.so from 2 file(s)
>> Creating libjava.so from 61 file(s)
>> Creating libfdlibm.a from 57 file(s)
>>