Re: [RFC/PATCH] Update compat/regex

On Thu, Jul 15, 2010 at 22:00, Jonathan Nieder [off-list ref] wrote:

The old glibc regular expression library git uses does not support
REG_STARTEND. Borrow the latest version from the GNU C library
(version 2.12, license is LGPL 2.1 or later).

Changes from glibc version: update the FSF address in the license
header, use _LIBC_REGEX macro to allow building outside of glibc,
add MAX, bool, true, and false macros to allow building with a C89
compiler.

Reintroduces warnings that were fixed in git before.  They can be
defeated again separately.  Nevertheless this should be an
improvement.

Those should be funneled upstream anyway, not just fixed in our tree.

Signed-off-by: Jonathan Nieder <redacted>
---
Ęvar Arnfjörš Bjarmason wrote:

quoted

Unfortunately that seems
easier said than done, since the library is now part of glibc, and has
aquired a lot of glibc specific macros and other constructs

Oh, come on. :)

Completely untested.

This patch has all the glibc-specific stuff that makes it break hard
if you don't have the GNU C library. Writing macros/definitions to fix all that
stuff up was the "easier said than done" part I was referring to.

It's probably not that hard (although I wouldn't put it past GNU to
have e.g. GCC-specific stuff in the code, but I haven't checked), just
tedious.

on Solaris:

    In file included from compat/regex/regex.c:73:
    compat/regex/regex_internal.c:40: error: syntax error before
"re_string_allocate"
    compat/regex/regex_internal.c:42: warning: return type defaults to `int'
    compat/regex/regex_internal.c:68: error: syntax error before
"re_string_construct"
    compat/regex/regex_internal.c:70: warning: return type defaults to `int'
    compat/regex/regex_internal.c:131: error: syntax error before
"re_string_realloc_buffers"
    compat/regex/regex_internal.c:132: warning: return type defaults to `int'
    compat/regex/regex_internal.c:132: error: conflicting types for
're_string_realloc_buffers'
    compat/regex/regex_internal.h:392: error: previous declaration of
're_string_realloc_buffers' was here
    compat/regex/regex_internal.c:132: error: conflicting types for
're_string_realloc_buffers'
    compat/regex/regex_internal.h:392: error: previous declaration of
're_string_realloc_buffers' was here
    compat/regex/regex_internal.c:572: error: syntax error before
"re_string_reconstruct"
    compat/regex/regex_internal.c:573: warning: return type defaults to `int'
    compat/regex/regex_internal.c: In function `re_string_reconstruct':
    compat/regex/regex_internal.c:687: warning: unused variable `prev_valid_len'
    compat/regex/regex_internal.c: At top level:
    compat/regex/regex_internal.c:962: error: syntax error before
"re_node_set_alloc"
    compat/regex/regex_internal.c:963: warning: return type defaults to `int'
    compat/regex/regex_internal.c:974: error: syntax error before
"re_node_set_init_1"
    compat/regex/regex_internal.c:975: warning: return type defaults to `int'
    compat/regex/regex_internal.c:990: error: syntax error before
"re_node_set_init_2"
    compat/regex/regex_internal.c:991: warning: return type defaults to `int'
    compat/regex/regex_internal.c:1020: error: syntax error before
"re_node_set_init_copy"
    compat/regex/regex_internal.c:1021: warning: return type defaults to `int'
    compat/regex/regex_internal.c:1045: error: syntax error before
"re_node_set_add_intersect"
    compat/regex/regex_internal.c:1047: warning: return type defaults to `int'
    compat/regex/regex_internal.c:1136: error: syntax error before
"re_node_set_init_union"
    compat/regex/regex_internal.c:1138: warning: return type defaults to `int'
    compat/regex/regex_internal.c:1189: error: syntax error before
"re_node_set_merge"
    compat/regex/regex_internal.c:1190: warning: return type defaults to `int'
    compat/regex/regex_internal.c:1272: error: syntax error before
"re_node_set_insert"
    compat/regex/regex_internal.c:1273: warning: return type defaults to `int'
    compat/regex/regex_internal.c:1329: error: syntax error before
"re_node_set_insert_last"
    compat/regex/regex_internal.c:1330: warning: return type defaults to `int'
    compat/regex/regex_internal.c: In function `re_dfa_add_node':
    compat/regex/regex_internal.c:1406: warning: unused variable `type'
    compat/regex/regex_internal.c: At top level:
    compat/regex/regex_internal.c:1472: error: syntax error before
"re_acquire_state"
    compat/regex/regex_internal.c:1474: warning: return type defaults to `int'
    compat/regex/regex_internal.c: In function `re_acquire_state':
    compat/regex/regex_internal.c:1493: warning: return makes integer
from pointer without a cast
    compat/regex/regex_internal.c:1501: warning: return makes integer
from pointer without a cast
    compat/regex/regex_internal.c: At top level:
    compat/regex/regex_internal.c:1516: error: syntax error before
"re_acquire_state_context"
    compat/regex/regex_internal.c:1518: warning: return type defaults to `int'
    compat/regex/regex_internal.c: In function `re_acquire_state_context':
    compat/regex/regex_internal.c:1537: warning: return makes integer
from pointer without a cast
    compat/regex/regex_internal.c:1544: warning: return makes integer
from pointer without a cast
    compat/regex/regex_internal.c: At top level:
    compat/regex/regex_internal.c:1553: error: syntax error before
"register_state"
    compat/regex/regex_internal.c:1555: warning: return type defaults to `int'
    compat/regex/regex_internal.c:1608: error: syntax error before
"create_ci_newstate"
    compat/regex/regex_internal.c:1610: warning: return type defaults to `int'
    compat/regex/regex_internal.c:1610: error: conflicting types for
'create_ci_newstate'
    compat/regex/regex_internal.c:27: error: previous declaration of
'create_ci_newstate' was here
    compat/regex/regex_internal.c:1610: error: conflicting types for
'create_ci_newstate'
    compat/regex/regex_internal.c:27: error: previous declaration of
'create_ci_newstate' was here
    compat/regex/regex_internal.c: In function `create_ci_newstate':
    compat/regex/regex_internal.c:1650: warning: return makes integer
from pointer without a cast
    compat/regex/regex_internal.c: At top level:
    compat/regex/regex_internal.c:1658: error: syntax error before
"create_cd_newstate"
    compat/regex/regex_internal.c:1660: warning: return type defaults to `int'
    compat/regex/regex_internal.c:1660: error: conflicting types for
'create_cd_newstate'
    compat/regex/regex_internal.c:31: error: previous declaration of
'create_cd_newstate' was here
    compat/regex/regex_internal.c:1660: error: conflicting types for
'create_cd_newstate'
    compat/regex/regex_internal.c:31: error: previous declaration of
'create_cd_newstate' was here
    compat/regex/regex_internal.c: In function `create_cd_newstate':
    compat/regex/regex_internal.c:1726: warning: return makes integer
from pointer without a cast
    In file included from compat/regex/regex.c:74:
    compat/regex/regcomp.c: In function `create_initial_state':
    compat/regex/regcomp.c:1013: warning: assignment makes pointer
from integer without a cast
    compat/regex/regcomp.c:1020: warning: assignment makes pointer
from integer without a cast
    compat/regex/regcomp.c:1022: warning: assignment makes pointer
from integer without a cast
    compat/regex/regcomp.c:1026: warning: assignment makes pointer
from integer without a cast
    In file included from compat/regex/regex.c:75:
    compat/regex/regexec.c: In function `regexec':
    compat/regex/regexec.c:230: warning: unused variable `dfa'
    compat/regex/regexec.c: In function `re_search_stub':
    compat/regex/regexec.c:418: warning: unused variable `dfa'
    compat/regex/regexec.c: At top level:
    compat/regex/regexec.c:629: error: syntax error before "re_search_internal"
    compat/regex/regexec.c:631: warning: return type defaults to `int'
    compat/regex/regexec.c:631: error: conflicting types for
're_search_internal'
    compat/regex/regexec.c:43: error: previous declaration of
're_search_internal' was here
    compat/regex/regexec.c:631: error: conflicting types for
're_search_internal'
    compat/regex/regexec.c:43: error: previous declaration of
're_search_internal' was here
    compat/regex/regexec.c:956: error: syntax error before
"prune_impossible_nodes"
    compat/regex/regexec.c:957: warning: return type defaults to `int'
    compat/regex/regexec.c:957: error: conflicting types for
'prune_impossible_nodes'
    compat/regex/regexec.c:56: error: previous declaration of
'prune_impossible_nodes' was here
    compat/regex/regexec.c:957: error: conflicting types for
'prune_impossible_nodes'
    compat/regex/regexec.c:56: error: previous declaration of
'prune_impossible_nodes' was here
    compat/regex/regexec.c: In function `acquire_init_state_context':
    compat/regex/regexec.c:1074: warning: return makes pointer from
integer without a cast
    compat/regex/regexec.c: At top level:
    compat/regex/regexec.c:1095: error: syntax error before "check_matching"
    compat/regex/regexec.c:1097: warning: return type defaults to `int'
    compat/regex/regexec.c:1097: error: conflicting types for 'check_matching'
    compat/regex/regexec.c:58: error: previous declaration of
'check_matching' was here
    compat/regex/regexec.c:1097: error: conflicting types for 'check_matching'
    compat/regex/regexec.c:58: error: previous declaration of
'check_matching' was here
    compat/regex/regexec.c:1368: error: syntax error before "push_fail_stack"
    compat/regex/regexec.c:1370: warning: return type defaults to `int'
    compat/regex/regexec.c:1370: error: conflicting types for 'push_fail_stack'
    compat/regex/regexec.c:69: error: previous declaration of
'push_fail_stack' was here
    compat/regex/regexec.c:1370: error: conflicting types for 'push_fail_stack'
    compat/regex/regexec.c:69: error: previous declaration of
'push_fail_stack' was here
    compat/regex/regexec.c:1415: error: syntax error before "set_regs"
    compat/regex/regexec.c:1417: warning: return type defaults to `int'
    compat/regex/regexec.c:1417: error: conflicting types for 'set_regs'
    compat/regex/regexec.c:73: error: previous declaration of
'set_regs' was here
    compat/regex/regexec.c:1417: error: conflicting types for 'set_regs'
    compat/regex/regexec.c:73: error: previous declaration of
'set_regs' was here
    compat/regex/regexec.c:1669: error: syntax error before
"build_sifted_states"
    compat/regex/regexec.c:1671: warning: return type defaults to `int'
    compat/regex/regexec.c:1671: error: conflicting types for
'build_sifted_states'
    compat/regex/regexec.c:89: error: previous declaration of
'build_sifted_states' was here
    compat/regex/regexec.c:1671: error: conflicting types for
'build_sifted_states'
    compat/regex/regexec.c:89: error: previous declaration of
'build_sifted_states' was here
    compat/regex/regexec.c: In function `merge_state_array':
    compat/regex/regexec.c:1772: warning: assignment makes pointer
from integer without a cast
    compat/regex/regexec.c: In function `update_cur_sifted_state':
    compat/regex/regexec.c:1815: warning: assignment makes pointer
from integer without a cast
    compat/regex/regexec.c: At top level:
    compat/regex/regexec.c:1831: error: syntax error before
"add_epsilon_src_nodes"
    compat/regex/regexec.c:1833: warning: return type defaults to `int'
    compat/regex/regexec.c:1833: error: conflicting types for
'add_epsilon_src_nodes'
    compat/regex/regexec.c:98: error: previous declaration of
'add_epsilon_src_nodes' was here
    compat/regex/regexec.c:1833: error: conflicting types for
'add_epsilon_src_nodes'
    compat/regex/regexec.c:98: error: previous declaration of
'add_epsilon_src_nodes' was here
    compat/regex/regexec.c: In function `add_epsilon_src_nodes':
    compat/regex/regexec.c:1837: warning: initialization makes pointer
from integer without a cast
    compat/regex/regexec.c: At top level:
    compat/regex/regexec.c:2144: error: syntax error before "sift_states_bkref"
    compat/regex/regexec.c:2146: warning: return type defaults to `int'
    compat/regex/regexec.c:2146: error: conflicting types for
'sift_states_bkref'
    compat/regex/regexec.c:120: error: previous declaration of
'sift_states_bkref' was here
    compat/regex/regexec.c:2146: error: conflicting types for
'sift_states_bkref'
    compat/regex/regexec.c:120: error: previous declaration of
'sift_states_bkref' was here
    compat/regex/regexec.c:2274: error: syntax error before "transit_state"
    compat/regex/regexec.c:2276: warning: return type defaults to `int'
    compat/regex/regexec.c:2276: error: conflicting types for 'transit_state'
    compat/regex/regexec.c:129: error: previous declaration of
'transit_state' was here
    compat/regex/regexec.c:2276: error: conflicting types for 'transit_state'
    compat/regex/regexec.c:129: error: previous declaration of
'transit_state' was here
    compat/regex/regexec.c: In function `transit_state':
    compat/regex/regexec.c:2303: warning: return makes integer from
pointer without a cast
    compat/regex/regexec.c:2314: warning: return makes integer from
pointer without a cast
    compat/regex/regexec.c:2316: warning: return makes integer from
pointer without a cast
    compat/regex/regexec.c: In function `merge_state_with_log':
    compat/regex/regexec.c:2375: warning: assignment makes pointer
from integer without a cast
    compat/regex/regexec.c: In function `transit_state_bkref':
    compat/regex/regexec.c:2648: warning: assignment makes pointer
from integer without a cast
    compat/regex/regexec.c:2665: warning: assignment makes pointer
from integer without a cast
    compat/regex/regexec.c: At top level:
    compat/regex/regexec.c:2699: error: syntax error before "get_subexp"
    compat/regex/regexec.c:2700: warning: return type defaults to `int'
    compat/regex/regexec.c:2700: error: conflicting types for 'get_subexp'
    compat/regex/regexec.c:153: error: previous declaration of
'get_subexp' was here
    compat/regex/regexec.c:2700: error: conflicting types for 'get_subexp'
    compat/regex/regexec.c:153: error: previous declaration of
'get_subexp' was here
    compat/regex/regexec.c:2899: error: syntax error before "check_arrival"
    compat/regex/regexec.c:2901: warning: return type defaults to `int'
    compat/regex/regexec.c:2901: error: conflicting types for 'check_arrival'
    compat/regex/regexec.c:164: error: previous declaration of
'check_arrival' was here
    compat/regex/regexec.c:2901: error: conflicting types for 'check_arrival'
    compat/regex/regexec.c:164: error: previous declaration of
'check_arrival' was here
    compat/regex/regexec.c: In function `check_arrival':
    compat/regex/regexec.c:2974: warning: assignment makes pointer
from integer without a cast
    compat/regex/regexec.c:3025: warning: assignment makes pointer
from integer without a cast
    compat/regex/regexec.c: At top level:
    compat/regex/regexec.c:3060: error: syntax error before
"check_arrival_add_next_nodes"
    compat/regex/regexec.c:3062: warning: return type defaults to `int'
    compat/regex/regexec.c:3062: error: conflicting types for
'check_arrival_add_next_nodes'
    compat/regex/regexec.c:169: error: previous declaration of
'check_arrival_add_next_nodes' was here
    compat/regex/regexec.c:3062: error: conflicting types for
'check_arrival_add_next_nodes'
    compat/regex/regexec.c:169: error: previous declaration of
'check_arrival_add_next_nodes' was here
    compat/regex/regexec.c: In function `check_arrival_add_next_nodes':
    compat/regex/regexec.c:3066: warning: unused variable `err'
    compat/regex/regexec.c: At top level:
    compat/regex/regexec.c:3192: error: syntax error before
"check_arrival_expand_ecl_sub"
    compat/regex/regexec.c:3194: warning: return type defaults to `int'
    compat/regex/regexec.c:3194: error: conflicting types for
'check_arrival_expand_ecl_sub'
    compat/regex/regexec.c:177: error: previous declaration of
'check_arrival_expand_ecl_sub' was here
    compat/regex/regexec.c:3194: error: conflicting types for
'check_arrival_expand_ecl_sub'
    compat/regex/regexec.c:177: error: previous declaration of
'check_arrival_expand_ecl_sub' was here
    compat/regex/regexec.c:3236: error: syntax error before "expand_bkref_cache"
    compat/regex/regexec.c:3238: warning: return type defaults to `int'
    compat/regex/regexec.c:3238: error: conflicting types for
'expand_bkref_cache'
    compat/regex/regexec.c:181: error: previous declaration of
'expand_bkref_cache' was here
    compat/regex/regexec.c:3238: error: conflicting types for
'expand_bkref_cache'
    compat/regex/regexec.c:181: error: previous declaration of
'expand_bkref_cache' was here
    compat/regex/regexec.c: In function `expand_bkref_cache':
    compat/regex/regexec.c:3309: warning: assignment makes pointer
from integer without a cast
    compat/regex/regexec.c: In function `build_trtable':
    compat/regex/regexec.c:3434: warning: assignment makes pointer
from integer without a cast
    compat/regex/regexec.c:3442: warning: assignment makes pointer
from integer without a cast
    compat/regex/regexec.c:3450: warning: assignment makes pointer
from integer without a cast
    compat/regex/regexec.c: At top level:
    compat/regex/regexec.c:4102: error: syntax error before "extend_buffers"
    compat/regex/regexec.c:4103: warning: return type defaults to `int'
    compat/regex/regexec.c:4103: error: conflicting types for 'extend_buffers'
    compat/regex/regexec.c:202: error: previous declaration of
'extend_buffers' was here
    compat/regex/regexec.c:4103: error: conflicting types for 'extend_buffers'
    compat/regex/regexec.c:202: error: previous declaration of
'extend_buffers' was here
    compat/regex/regexec.c:4165: error: syntax error before "match_ctx_init"
    compat/regex/regexec.c:4166: warning: return type defaults to `int'
    compat/regex/regexec.c:4166: error: conflicting types for 'match_ctx_init'
    compat/regex/regexec.c:22: error: previous declaration of
'match_ctx_init' was here
    compat/regex/regexec.c:4166: error: conflicting types for 'match_ctx_init'
    compat/regex/regexec.c:22: error: previous declaration of
'match_ctx_init' was here
    compat/regex/regexec.c:4238: error: syntax error before
"match_ctx_add_entry"
    compat/regex/regexec.c:4240: warning: return type defaults to `int'
    compat/regex/regexec.c:4240: error: conflicting types for
'match_ctx_add_entry'
    compat/regex/regexec.c:27: error: previous declaration of
'match_ctx_add_entry' was here
    compat/regex/regexec.c:4240: error: conflicting types for
'match_ctx_add_entry'
    compat/regex/regexec.c:27: error: previous declaration of
'match_ctx_add_entry' was here
    compat/regex/regexec.c:4310: error: syntax error before
"match_ctx_add_subtop"
    compat/regex/regexec.c:4311: warning: return type defaults to `int'
    compat/regex/regexec.c:4311: error: conflicting types for
'match_ctx_add_subtop'
    compat/regex/regexec.c:31: error: previous declaration of
'match_ctx_add_subtop' was here
    compat/regex/regexec.c:4311: error: conflicting types for
'match_ctx_add_subtop'
    compat/regex/regexec.c:31: error: previous declaration of
'match_ctx_add_subtop' was here
    compat/regex/regex_internal.h:392: warning:
're_string_realloc_buffers' declared `static' but never defined
    compat/regex/regex_internal.c:27: warning: 'create_ci_newstate'
declared `static' but never defined
    compat/regex/regex_internal.c:31: warning: 'create_cd_newstate'
declared `static' but never defined
    compat/regex/regexec.c:22: warning: 'match_ctx_init' declared
`static' but never defined
    compat/regex/regexec.c:27: warning: 'match_ctx_add_entry' declared
`static' but never defined
    compat/regex/regexec.c:31: warning: 'match_ctx_add_subtop'
declared `static' but never defined
    compat/regex/regexec.c:43: warning: 're_search_internal' declared
`static' but never defined
    compat/regex/regexec.c:56: warning: 'prune_impossible_nodes'
declared `static' but never defined
    compat/regex/regexec.c:58: warning: 'check_matching' declared
`static' but never defined
    compat/regex/regexec.c:69: warning: 'push_fail_stack' declared
`static' but never defined
    compat/regex/regexec.c:73: warning: 'set_regs' declared `static'
but never defined
    compat/regex/regexec.c:89: warning: 'build_sifted_states' declared
`static' but never defined
    compat/regex/regexec.c:98: warning: 'add_epsilon_src_nodes'
declared `static' but never defined
    compat/regex/regexec.c:120: warning: 'sift_states_bkref' declared
`static' but never defined
    compat/regex/regexec.c:129: warning: 'transit_state' declared
`static' but never defined
    compat/regex/regexec.c:153: warning: 'get_subexp' declared
`static' but never defined
    compat/regex/regexec.c:164: warning: 'check_arrival' declared
`static' but never defined
    compat/regex/regexec.c:169: warning:
'check_arrival_add_next_nodes' declared `static' but never defined
    compat/regex/regexec.c:177: warning:
'check_arrival_expand_ecl_sub' declared `static' but never defined
    compat/regex/regexec.c:181: warning: 'expand_bkref_cache' declared
`static' but never defined
    compat/regex/regexec.c:202: warning: 'extend_buffers' declared
`static' but never defined
    gmake: *** [compat/regex/regex.o] Error 1

And on FreeBSD:

    In file included from git-compat-util.h:93,
                     from cache.h:4,
                     from thread-utils.c:1:
    compat/regex/regex.h:367: warning: declaration does not declare anything
        CC compat/memmem.o
    In file included from compat/../git-compat-util.h:93,
                     from compat/memmem.c:1:
    compat/regex/regex.h:367: warning: declaration does not declare anything
        CC compat/regex/regex.o
    In file included from compat/regex/regex.c:63:
    compat/regex/regex_internal.h:421:20: error: alloca.h: No such
file or directory
    In file included from compat/regex/regex.c:73:
    compat/regex/regex_internal.c:40: error: expected '=', ',', ';',
'asm' or '__attribute__' before 're_string_allocate'
    compat/regex/regex_internal.c:68: error: expected '=', ',', ';',
'asm' or '__attribute__' before 're_string_construct'
    compat/regex/regex_internal.c:131: error: expected '=', ',', ';',
'asm' or '__attribute__' before 're_string_realloc_buffers'
    compat/regex/regex_internal.c:572: error: expected '=', ',', ';',
'asm' or '__attribute__' before 're_string_reconstruct'
    compat/regex/regex_internal.c:962: error: expected '=', ',', ';',
'asm' or '__attribute__' before 're_node_set_alloc'
    compat/regex/regex_internal.c:974: error: expected '=', ',', ';',
'asm' or '__attribute__' before 're_node_set_init_1'
    compat/regex/regex_internal.c:990: error: expected '=', ',', ';',
'asm' or '__attribute__' before 're_node_set_init_2'
    compat/regex/regex_internal.c:1020: error: expected '=', ',', ';',
'asm' or '__attribute__' before 're_node_set_init_copy'
    compat/regex/regex_internal.c:1045: error: expected '=', ',', ';',
'asm' or '__attribute__' before 're_node_set_add_intersect'
    compat/regex/regex_internal.c:1136: error: expected '=', ',', ';',
'asm' or '__attribute__' before 're_node_set_init_union'
    compat/regex/regex_internal.c:1189: error: expected '=', ',', ';',
'asm' or '__attribute__' before 're_node_set_merge'
    compat/regex/regex_internal.c:1272: error: expected '=', ',', ';',
'asm' or '__attribute__' before 're_node_set_insert'
    compat/regex/regex_internal.c:1329: error: expected '=', ',', ';',
'asm' or '__attribute__' before 're_node_set_insert_last'
    compat/regex/regex_internal.c: In function 're_dfa_add_node':
    compat/regex/regex_internal.c:1406: warning: unused variable 'type'
    compat/regex/regex_internal.c: At top level:
    compat/regex/regex_internal.c:1472: error: expected '=', ',', ';',
'asm' or '__attribute__' before 're_acquire_state'
    compat/regex/regex_internal.c:1516: error: expected '=', ',', ';',
'asm' or '__attribute__' before 're_acquire_state_context'
    compat/regex/regex_internal.c:1553: error: expected '=', ',', ';',
'asm' or '__attribute__' before 'register_state'
    compat/regex/regex_internal.c:1608: error: expected '=', ',', ';',
'asm' or '__attribute__' before 'create_ci_newstate'
    compat/regex/regex_internal.c:1658: error: expected '=', ',', ';',
'asm' or '__attribute__' before 'create_cd_newstate'
    In file included from compat/regex/regex.c:74:
    compat/regex/regcomp.c: In function 're_compile_internal':
    compat/regex/regcomp.c:778: warning: implicit declaration of
function 're_string_construct'
    compat/regex/regcomp.c: In function 'create_initial_state':
    compat/regex/regcomp.c:969: warning: implicit declaration of
function 're_node_set_init_copy'
    compat/regex/regcomp.c:1002: warning: implicit declaration of
function 're_node_set_merge'
    compat/regex/regcomp.c:1013: warning: implicit declaration of
function 're_acquire_state_context'
    compat/regex/regcomp.c:1013: warning: assignment makes pointer
from integer without a cast
    compat/regex/regcomp.c:1020: warning: assignment makes pointer
from integer without a cast
    compat/regex/regcomp.c:1022: warning: assignment makes pointer
from integer without a cast
    compat/regex/regcomp.c:1026: warning: assignment makes pointer
from integer without a cast
    compat/regex/regcomp.c: In function 'link_nfa_nodes':
    compat/regex/regcomp.c:1408: warning: implicit declaration of
function 're_node_set_init_2'
    compat/regex/regcomp.c:1415: warning: implicit declaration of
function 're_node_set_init_1'
    compat/regex/regcomp.c: In function 'duplicate_node_closure':
    compat/regex/regcomp.c:1459: warning: implicit declaration of
function 're_node_set_insert'
    compat/regex/regcomp.c: In function 'calc_inveclosure':
    compat/regex/regcomp.c:1590: warning: implicit declaration of
function 're_node_set_insert_last'
    compat/regex/regcomp.c: In function 'calc_eclosure_iter':
    compat/regex/regcomp.c:1653: warning: implicit declaration of
function 're_node_set_alloc'
    In file included from compat/regex/regex.c:75:
    compat/regex/regexec.c: In function 'regexec':
    compat/regex/regexec.c:230: warning: unused variable 'dfa'
    compat/regex/regexec.c: In function 're_search_stub':
    compat/regex/regexec.c:418: warning: unused variable 'dfa'
    compat/regex/regexec.c: At top level:
    compat/regex/regexec.c:629: error: expected '=', ',', ';', 'asm'
or '__attribute__' before 're_search_internal'
    compat/regex/regexec.c:636: error: expected identifier or '('
before '{' token
    compat/regex/regexec.c:956: error: expected '=', ',', ';', 'asm'
or '__attribute__' before 'prune_impossible_nodes'
    compat/regex/regexec.c:958: error: expected identifier or '('
before '{' token
    compat/regex/regexec.c: In function 'acquire_init_state_context':
    compat/regex/regexec.c:1074: warning: return makes pointer from
integer without a cast
    compat/regex/regexec.c: At top level:
    compat/regex/regexec.c:1095: error: expected '=', ',', ';', 'asm'
or '__attribute__' before 'check_matching'
    compat/regex/regexec.c:1368: error: expected '=', ',', ';', 'asm'
or '__attribute__' before 'push_fail_stack'
    compat/regex/regexec.c:1415: error: expected '=', ',', ';', 'asm'
or '__attribute__' before 'set_regs'
    compat/regex/regexec.c:1669: error: expected '=', ',', ';', 'asm'
or '__attribute__' before 'build_sifted_states'
    compat/regex/regexec.c: In function 'merge_state_array':
    compat/regex/regexec.c:1768: warning: implicit declaration of
function 're_node_set_init_union'
    compat/regex/regexec.c:1772: warning: implicit declaration of
function 're_acquire_state'
    compat/regex/regexec.c:1772: warning: assignment makes pointer
from integer without a cast
    compat/regex/regexec.c: In function 'update_cur_sifted_state':
    compat/regex/regexec.c:1815: warning: assignment makes pointer
from integer without a cast
    compat/regex/regexec.c: At top level:
    compat/regex/regexec.c:1831: error: expected '=', ',', ';', 'asm'
or '__attribute__' before 'add_epsilon_src_nodes'
    compat/regex/regexec.c: In function 'sub_epsilon_src_nodes':
    compat/regex/regexec.c:1884: warning: implicit declaration of
function 're_node_set_add_intersect'
    compat/regex/regexec.c: At top level:
    compat/regex/regexec.c:2144: error: expected '=', ',', ';', 'asm'
or '__attribute__' before 'sift_states_bkref'
    compat/regex/regexec.c:2274: error: expected '=', ',', ';', 'asm'
or '__attribute__' before 'transit_state'
    compat/regex/regexec.c: In function 'merge_state_with_log':
    compat/regex/regexec.c:2375: warning: assignment makes pointer
from integer without a cast
    compat/regex/regexec.c: In function 'transit_state_bkref':
    compat/regex/regexec.c:2648: warning: assignment makes pointer
from integer without a cast
    compat/regex/regexec.c:2665: warning: assignment makes pointer
from integer without a cast
    compat/regex/regexec.c: At top level:
    compat/regex/regexec.c:2699: error: expected '=', ',', ';', 'asm'
or '__attribute__' before 'get_subexp'
    compat/regex/regexec.c:2899: error: expected '=', ',', ';', 'asm'
or '__attribute__' before 'check_arrival'
    compat/regex/regexec.c:3060: error: expected '=', ',', ';', 'asm'
or '__attribute__' before 'check_arrival_add_next_nodes'
    compat/regex/regexec.c:3192: error: expected '=', ',', ';', 'asm'
or '__attribute__' before 'check_arrival_expand_ecl_sub'
    compat/regex/regexec.c:3236: error: expected '=', ',', ';', 'asm'
or '__attribute__' before 'expand_bkref_cache'
    compat/regex/regexec.c: In function 'build_trtable':
    compat/regex/regexec.c:3434: warning: assignment makes pointer
from integer without a cast
    compat/regex/regexec.c:3442: warning: assignment makes pointer
from integer without a cast
    compat/regex/regexec.c:3450: warning: assignment makes pointer
from integer without a cast
    compat/regex/regexec.c: At top level:
    compat/regex/regexec.c:4102: error: expected '=', ',', ';', 'asm'
or '__attribute__' before 'extend_buffers'
    compat/regex/regexec.c:4165: error: expected '=', ',', ';', 'asm'
or '__attribute__' before 'match_ctx_init'
    compat/regex/regexec.c:4238: error: expected '=', ',', ';', 'asm'
or '__attribute__' before 'match_ctx_add_entry'
    compat/regex/regexec.c:4310: error: expected '=', ',', ';', 'asm'
or '__attribute__' before 'match_ctx_add_subtop'
    gmake: *** [compat/regex/regex.o] Error 1