[Bug 1270862] Re: libpcre3 1:8.31-2ubuntu2 : not ready for --enable-jit option

[Tony Reix]

Here is the trace when building PCRE 8.31 from Ubuntu sources:

sudo dpkg-buildpackage

...

CC_FOR_BUILD=cc CPPFLAGS="-D_FORTIFY_SOURCE=2" CFLAGS="-Wall -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security" LDFLAGS="-Wl,-Bsymbolic-functions -Wl,-z,relro" \
	    ./configure \
		--host=powerpc64le-linux-gnu --build=powerpc64le-linux-gnu \
		--prefix=/usr --mandir=\${prefix}/share/man \
		--infodir=\${prefix}/share/info \
		--libdir=\${prefix}/lib/powerpc64le-linux-gnu \
		--enable-utf8 --enable-unicode-properties \
		--disable-silent-rules

No JIT,  and no 16bit library.

pcre-8.31 configuration summary:

    Install prefix .................. : /usr
    C preprocessor .................. : powerpc64le-linux-gnu-gcc -E
    C compiler ...................... : powerpc64le-linux-gnu-gcc
    C++ preprocessor ................ : powerpc64le-linux-gnu-g++ -E
    C++ compiler .................... : powerpc64le-linux-gnu-g++
    Linker .......................... : /usr/bin/ld
    C preprocessor flags ............ : -D_FORTIFY_SOURCE=2
    C compiler flags ................ : -Wall -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security
    C++ compiler flags .............. : -O2
    Linker flags .................... : -Wl,-Bsymbolic-functions -Wl,-z,relro
    Extra libraries ................. :

    Build 8 bit pcre library ........ : yes
    Build 16 bit pcre library ....... : no
    Build C++ library ............... : yes
    Enable JIT compiling support .... : no
    Enable UTF-8/16 support ......... : yes
    Unicode properties .............. : yes
    Newline char/sequence ........... : lf
    \R matches only ANYCRLF ......... : no
    EBCDIC coding ................... : no
    Rebuild char tables ............. : no
    Use stack recursion ............. : yes
    POSIX mem threshold ............. : 10
    Internal link size .............. : 2
    Match limit ..................... : 10000000
    Match limit recursion ........... : MATCH_LIMIT
    Build shared libs ............... : yes
    Build static libs ............... : yes
    Use JIT in pcregrep ............. : no
    Buffer size for pcregrep ........ : 20480
    Link pcregrep with libz ......... : no
    Link pcregrep with libbz2 ....... : no
    Link pcretest with libedit ...... : no
    Link pcretest with libreadline .. : no

PASS: pcrecpp_unittest
PASS: pcre_scanner_unittest
PASS: pcre_stringpiece_unittest
PASS: RunTest
PASS: RunGrepTest


In order to check that all main PCRE features run fine on Ubuntu/PPC/LE, at least the following options should be added to the ./configure line: 
--enable-shared=no --enable-pcre16 --enable-pcre32 --enable-unicode-properties --enable-jit

Using --enable-jit with this 8.31 version will not work; too old for
PPC. Use fresher version, like 8.34 . However, work is still being done
for making JIT test OK on PCRE 8.34 on Ubuntu/PPC/LE (ABI issue).

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https://bugs.launchpad.net/bugs/1270862

Title:
  libpcre3 1:8.31-2ubuntu2 : not ready for  --enable-jit option

Status in “pcre3” package in Ubuntu:
  New

Bug description:
  Version 8.31 of libpcre3 (pcre3 sources) is not ready for --enable-jit
  option on Linux/PPC64 LE. It even does not compile.

  Version 8.34 of libpcre3 does include code for Linux on PPC64-LE. However, this code still fails for JIT. It is being fixed now.
  Staty tune with:  http://bugs.exim.org/show_bug.cgi?id=1430 .

  The current version 8.31 of libpcre3 on Ybuntu PPC64/LE should be
  replaced by the version (8.35 ?) that fixes the JIT issues on PPC64/LE
  (it is OK on PPC64/BE).

  
  /home/tony/PCRE/pcre3-8.31:

  In file included from sljit/sljitNativePPC_common.c:417:0,
                   from sljit/sljitLir.c:1251,
                   from pcre_jit_compile.c:62:
  sljit/sljitNativePPC_64.c: In function 'sljit_set_function_context':
  sljit/sljitNativePPC_64.c:425:9: error: dereferencing pointer to incomplete type
    context->addr = addr ? addr : ptrs[0];
           ^
  sljit/sljitNativePPC_64.c:426:9: error: dereferencing pointer to incomplete type
    context->r2 = ptrs[1];
           ^
  sljit/sljitNativePPC_64.c:427:9: error: dereferencing pointer to incomplete type
    context->r11 = ptrs[2];

  
  pcre-8.34:

  make  check-TESTS
  make[2]: Entering directory `/home/tony/PCRE/pcre-8.XX/trunk'
  make[3]: Entering directory `/home/tony/PCRE/pcre-8.XX/trunk'
  ./test-driver: line 107: 32524 Illegal instruction     (core dumped) "$@" > $log_file 2>&1
  FAIL: pcre_jit_test


  $ lsb_release -rd
  Description:	Ubuntu Trusty Tahr (development branch)
  Release:	14.04

  
  $ lsb_release -rd
  Description:	Ubuntu Trusty Tahr (development branch)
  Release:	14.04
  tony at tony1:~/PCRE/pcre3-8.31$ apt-cache policy libpcre3
  libpcre3:
    Installed: 1:8.31-2ubuntu2
    Candidate: 1:8.31-2ubuntu2
    Version table:
   *** 1:8.31-2ubuntu2 0
          500 http://ports.ubuntu.com/ubuntu-ports/ trusty/main ppc64el Packages
          100 /var/lib/dpkg/status

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