Compilation error with clang++3.8

[hanw]

Tried to compile p4c in docker's ubuntu-latest image with clang++3.8, but got the following error.

root@d8f907559953:~/p4c/build# make -j4
CXX tools/ir-generator/ir-generator.o
CXX lib/crash.o
CXX lib/gc.o
CXX lib/hex.o
CXX lib/indent.o
CXX lib/json.o
CXX lib/log.o
../tools/ir-generator/ir-generator.ypp:140:13: error: use of undeclared identifier 'PARSE_BRACKET'
{ BEGIN(PARSE_BRACKET); }
^
../tools/ir-generator/ir-generator.ypp:170:49: error: use of undeclared identifier 'PARSE_BRACKET'
{ (yyval.kind) = NodeKind::Interface; BEGIN(PARSE_BRACKET); }
^
../tools/ir-generator/ir-generator.ypp:171:48: error: use of undeclared identifier 'PARSE_BRACKET'
{ (yyval.kind) = NodeKind::Abstract; BEGIN(PARSE_BRACKET); }
^
../tools/ir-generator/ir-generator.ypp:172:48: error: use of undeclared identifier 'PARSE_BRACKET'
{ (yyval.kind) = NodeKind::Concrete; BEGIN(PARSE_BRACKET); }
^
../tools/ir-generator/ir-generator.ypp:194:13: error: use of undeclared identifier 'PARSE_BRACKET'
{ BEGIN(PARSE_BRACKET); }
^
../tools/ir-generator/ir-generator.ypp:209:13: error: use of undeclared identifier 'PARSE_CTOR_INIT'
{ BEGIN(PARSE_CTOR_INIT); }
^
../tools/ir-generator/ir-generator.ypp:212:19: error: use of undeclared identifier 'NORMAL'
BEGIN(NORMAL); }
^
../tools/ir-generator/ir-generator.ypp:366:13: error: use of undeclared identifier 'yyrestart'
yyrestart(fp);
^
../tools/ir-generator/ir-generator.ypp:367:19: error: use of undeclared identifier 'NORMAL'
BEGIN(NORMAL);
^
CXX lib/match.o
9 errors generated.
Makefile:1828: recipe for target 'tools/ir-generator/ir-generator.o' failed
make: *** [tools/ir-generator/ir-generator.o] Error 1
make: *** Waiting for unfinished jobs....

[mihaibudiu]

This is very strange. There should be a file generated by flex: build/tools/ir-generator-lex.c, which should be #included in this one, which contains the definition of PARSE_BRACKET. Is this the whole output from make? I don't see where flex has been executed.

[ChrisDodd]

That looks like something went wrong with flex generation, since those are
all symbols defined in the code generated by flex. Try rm
tools/ir-generator/ir-generator-lex.c and then run make again...

On Thu, Jun 23, 2016 at 5:20 PM, Han Wang notifications@github.com wrote:

Tried to compile p4c in docker's ubuntu-latest image with clang++3.8, but
got the following error.

root@d8f9075 https://github.com/root/p4c/commit/d8f907559953:~/p4c/build#
make -j4
CXX tools/ir-generator/ir-generator.o
CXX lib/crash.o
CXX lib/gc.o
CXX lib/hex.o
CXX lib/indent.o
CXX lib/json.o
CXX lib/log.o
../tools/ir-generator/ir-generator.ypp:140:13: error: use of undeclared
identifier 'PARSE_BRACKET'
{ BEGIN(PARSE_BRACKET); }
^
../tools/ir-generator/ir-generator.ypp:170:49: error: use of undeclared
identifier 'PARSE_BRACKET'
{ (yyval.kind) = NodeKind::Interface; BEGIN(PARSE_BRACKET); }
^
../tools/ir-generator/ir-generator.ypp:171:48: error: use of undeclared
identifier 'PARSE_BRACKET'
{ (yyval.kind) = NodeKind::Abstract; BEGIN(PARSE_BRACKET); }
^
../tools/ir-generator/ir-generator.ypp:172:48: error: use of undeclared
identifier 'PARSE_BRACKET'
{ (yyval.kind) = NodeKind::Concrete; BEGIN(PARSE_BRACKET); }
^
../tools/ir-generator/ir-generator.ypp:194:13: error: use of undeclared
identifier 'PARSE_BRACKET'
{ BEGIN(PARSE_BRACKET); }
^
../tools/ir-generator/ir-generator.ypp:209:13: error: use of undeclared
identifier 'PARSE_CTOR_INIT'
{ BEGIN(PARSE_CTOR_INIT); }
^
../tools/ir-generator/ir-generator.ypp:212:19: error: use of undeclared
identifier 'NORMAL'
BEGIN(NORMAL); }
^
../tools/ir-generator/ir-generator.ypp:366:13: error: use of undeclared
identifier 'yyrestart'
yyrestart(fp);
^
../tools/ir-generator/ir-generator.ypp:367:19: error: use of undeclared
identifier 'NORMAL'
BEGIN(NORMAL);
^
CXX lib/match.o
9 errors generated.
Makefile:1828: recipe for target 'tools/ir-generator/ir-generator.o' failed
make: *** [tools/ir-generator/ir-generator.o] Error 1
make: *** Waiting for unfinished jobs....

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[hanw]

Thanks, I removed build directory and rerun ./bootstrap.sh, compilation is successful this time.
I installed clang++, instead of g++ this time. That might be the reason.