[英]Why can't I compile with OpenBSD?
My program used to compile fine with OpenBSD before I added the lemon parser. 在添加Lemon解析器之前,我的程序曾经使用OpenBSD可以正常编译。 Now it compiles on Linux but on OpenBSD I get an error I don't understand.
现在它可以在Linux上编译,但是在OpenBSD上却收到一个我不明白的错误。
$ cmake ..
-- The C compiler identification is GNU 4.2.1
-- The CXX compiler identification is GNU 4.2.1
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Configuring done
-- Generating done
-- Build files have been written to: /home/dac/test/openshell/build
$ make
Scanning dependScanning dependencies of target shell
[ 28%] Building C object CMakeFiles/shell.dir/main.c.o
/home/dac/test/openshell/main.c: In function 'main':
/home/dac/test/openshell/main.c:788: warning: implicit declaration of function 'add_history'
/home/dac/test/openshell/main.c: In function 'command':
/home/dac/test/openshell/main.c:573: warning: passing argument 1 of 'expandVariable' discards qualifiers from pointer target type
cc: -ledit: linker input file unused because linking not done
cc: -lncurses: linker input file unused because linking not done
cc: -lcurses: linker input file unused because linking not done
cc: -ltermcap: linker input file unused because linking not done
[ 42%] Building C object CMakeFiles/shell.dir/shellparser.c.o
/home/dac/test/openshell/shellparser.c:280: error: expected expression before '%' token
/home/dac/test/openshell/shellparser.c:288: error: expected expression before '%' token
/home/dac/test/openshell/shellparser.c:288: error: initializer element is not constant
/home/dac/test/openshell/shellparser.c:288: error: (near initialization for 'yyRuleName[0]')
/home/dac/test/openshell/shellparser.c: In function 'yy_destructor':
/home/dac/test/openshell/shellparser.c:370: error: expected expression before '%' token
/home/dac/test/openshell/shellparser.c:370: warning: statement with no effect
/home/dac/test/openshell/shellparser.c: In function 'yyStackOverflow':
/home/dac/test/openshell/shellparser.c:551: error: expected expression before '%' token
/home/dac/test/openshell/shellparser.c:551: warning: statement with no effect
/home/dac/test/openshell/shellparser.c: At top level:
/home/dac/test/openshell/shellparser.c:609: error: expected expression before '%' token
/home/dac/test/openshell/shellparser.c:609: warning: missing braces around initializer
/home/dac/test/openshell/shellparser.c:609: warning: (near initialization for 'yyRuleInfo[0]')
/home/dac/test/openshell/shellparser.c:609: error: initializer element is not constant
/home/dac/test/openshell/shellparser.c:609: error: (near initialization for 'yyRuleInfo[0].lhs')
/home/dac/test/openshell/shellparser.c: In function 'yy_reduce':
/home/dac/test/openshell/shellparser.c:664: error: expected expression before '%' token
/home/dac/test/openshell/shellparser.c:664: warning: statement with no effect
/home/dac/test/openshell/shellparser.c: In function 'yy_parse_failed':
/home/dac/test/openshell/shellparser.c:710: error: expected expression before '%' token
/home/dac/test/openshell/shellparser.c:710: warning: statement with no effect
/home/dac/test/openshell/shellparser.c: In function 'yy_syntax_error':
/home/dac/test/openshell/shellparser.c:726: error: expected expression before '%' token
/home/dac/test/openshell/shellparser.c:726: warning: statement with no effect
/home/dac/test/openshell/shellparser.c: In function 'yy_accept':
/home/dac/test/openshell/shellparser.c:745: error: expected expression before '%' token
/home/dac/test/openshell/shellparser.c:745: warning: statement with no effect
/home/dac/test/openshell/shellparser.c: At top level:
/home/dac/test/openshell/shellparser.c:918: error: expected identifier or '(' before string constant
/home/dac/test/openshell/shellparser.c:929: error: expected identifier or '(' before ',' token
Why is is happening and what can I do about it? 为什么会发生,我该怎么办? Did I forget to include a library?
我忘了包括图书馆吗? My cmake file is
我的cmake文件是
cmake_minimum_required(VERSION 3.0)
project(shell.test)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -L/usr/local/include/ -L/usr/include -std=c99 -pedantic -O3 -g -Wall -pedantic -ledit -lncurses -lcurses -ltermcap")
include_directories(/usr/local/include/ /usr/include)
link_directories(/usr/lib)
link_directories(/usr/local/lib)
add_executable(shell main.c shellparser.c errors.c util.c)
target_link_libraries(shell edit readline)
add_custom_target(shellparser DEPENDS ${CMAKE_SOURCE_DIR}/shellparser.c)
add_custom_command(OUTPUT ${CMAKE_SOURCE_DIR}/shellparser.c COMMAND lemon -s ${CMAKE_SOURCE_DIR}/shellparser.y DEPENDS ${CMAKE_SOURCE_DIR}/shellparser.y)
add_dependencies(shell shellparser)
set_property(TARGET shell PROPERTY C_STANDARD 99)$
On Ubuntu I can build it successfully: 在Ubuntu上,我可以成功构建它:
$ git clone http://github.com/montao/openshell
Cloning into 'openshell'...
remote: Counting objects: 1439, done.
remote: Compressing objects: 100% (184/184), done.
remote: Total 1439 (delta 124), reused 0 (delta 0), pack-reused 1255
Receiving objects: 100% (1439/1439), 405.08 KiB | 117.00 KiB/s, done.
Resolving deltas: 100% (973/973), done.
Checking connectivity... done.
dac@dac-Latitude-E7450:~/montao/test$ cd openshell/
dac@dac-Latitude-E7450:~/montao/test/openshell$ mkdir build
dac@dac-Latitude-E7450:~/montao/test/openshell$ cd build/
dac@dac-Latitude-E7450:~/montao/test/openshell/build$ cmake ..
-- The C compiler identification is GNU 5.3.1
-- The CXX compiler identification is GNU 5.3.1
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Configuring done
-- Generating done
-- Build files have been written to: /home/dac/montao/test/openshell/build
dac@dac-Latitude-E7450:~/montao/test/openshell/build$ make
Scanning dependencies of target shellparser
[ 14%] Generating ../shellparser.c
Parser statistics:
terminal symbols................... 9
non-terminal symbols............... 3
total symbols...................... 12
rules.............................. 8
states............................. 14
conflicts.......................... 0
action table entries............... 32
total table size (bytes)........... 100
[ 14%] Built target shellparser
Scanning dependencies of target shell
[ 28%] Building C object CMakeFiles/shell.dir/main.c.o
/home/dac/montao/test/openshell/main.c: In function ‘free_pipeline’:
/home/dac/montao/test/openshell/main.c:337:6: note: the ABI of passing struct with a flexible array member has changed in GCC 4.4
void free_pipeline(struct pipeline pipe) {
^
[ 42%] Building C object CMakeFiles/shell.dir/shellparser.c.o
[ 57%] Building C object CMakeFiles/shell.dir/errors.c.o
[ 71%] Building C object CMakeFiles/shell.dir/util.c.o
/home/dac/montao/test/openshell/util.c: In function ‘make_args’:
/home/dac/montao/test/openshell/util.c:1100:52: warning: operation on ‘jc’ may be undefined [-Wsequence-point]
char *str = concat((char *) *retArgv[jc++], (char *) *retArgv[jc]);
^
/home/dac/montao/test/openshell/util.c:1100:19: warning: unused variable ‘str’ [-Wunused-variable]
char *str = concat((char *) *retArgv[jc++], (char *) *retArgv[jc]);
^
[ 85%] Linking C executable shell
[100%] Built target shell
No matter what I do, the error is there when I compile with OpenBSD. 无论我做什么,使用OpenBSD编译时都会出现错误。 I tried everything.
我尝试了一切。
I haven't used OpenBSD but this could be caused by an "ancient" GCC 4.2.1 which was released 18 July 2007. On Ubuntu it's compiled with more recent GCC. 我没有使用过OpenBSD,但这可能是由2007年7月18日发布的“古老” GCC 4.2.1引起的。在Ubuntu上,它是使用较新的GCC编译的。
In fact if you check dependencies of project you want to build 实际上,如果您检查要构建的项目的依存关系
Dependencies: editline, ncurses, C99
依赖项:editline,ncurses,C99
And C99 support in gcc GCC中的 C99支持
C99 is substantially completely supported as of GCC 4.5 (with -std=c99 -pedantic-errors used; -fextended-identifiers also needed to enable extended identifiers before GCC 5)
从GCC 4.5开始,基本上完全支持C99(使用-std = c99 -pedantic-errors;还需要-fextended-identifiers才能在GCC 5之前启用扩展标识符)
I can compile it like this with OpenBSD 5.9 我可以使用OpenBSD 5.9这样编译它
gcc -std=c99 shellparser.c main.c util.c errors.c -ledit -ltermcap
IF I first generate the shellparser.c with Linux and copy the file to OpenBSD, then the above works to build for OpenBSD. 如果我先用Linux生成shellparser.c,然后将文件复制到OpenBSD,则上面的代码可以为OpenBSD构建。 But I still can't generate the C from the grammar with OpenBSD, there comes a compilation error.
但是我仍然无法使用OpenBSD从语法生成C,但是会出现编译错误。 I can recreate the compilation error on Ubuntu and I'm still looking for what causes the diff in the generated C when I run
lemon shellparser.y
我可以在Ubuntu上重新创建编译错误,并且当我运行
lemon shellparser.y
时,我仍在寻找导致生成的C差异的原因。
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