我找到了许多关于如何使用ocamlbuild从C源构建.o文件的ocamlbuild 。 但是，这些不适用于C ++文件，而ocamlbuild无法开箱即用。
我尝试过写一个myocamlbuild.ml文件（请求后面显示），提供从.cpp到.o的规则，并且在ocamlc失败时抱怨它不知道如何处理.cpp文件（即使编译器设置好了）通过命令行标志来g++ 。
open Ocamlbuild_plugin ;;
let ext_obj = !Options.ext_obj;;
let x_o = "%"-.-ext_obj;;
rule "ocaml C++ stubs: cpp -> o"
~prod:x_o
~dep:"%.cpp"
begin fun env _build ->
let c = env "%.cpp" in
let o = env x_o in
let comp =
if Tags.mem "native" (tags_of_pathname c) then !Options.ocamlopt else !Options.ocamlc in
let cc =
Cmd(S[comp; T(tags_of_pathname c++"c"++"compile"); A"-custom"; A"-cc"; A"g++"; A"-c"; Px c]) in
if Pathname.dirname o = Pathname.current_dir_name then cc
else Seq[cc; mv (Pathname.basename o) o]
end;;
libsoundness.clib文件由一堆.o文件组成。
当我做ocamlbuild libsoundness.a我得到以下输出：
Finished, 0 targets (0 cached) in 00:00:00.
+ /usr/bin/ocamlc.opt -custom -cc g++ -c src/soundness/proof_aut.cpp
/usr/bin/ocamlc.opt: don't know what to do with src/soundness/proof_aut.cpp.
Usage: ocamlc <options> <files>
<snipped long list of ocamlc options>
C ++的唯一其他解决方案似乎是ocamlbuild-ctools其网站已不存在（我无法下载任何来源）。
有任何想法吗？
I have found many guides on how to build .o files from C sources using ocamlbuild. These do not apply to C++ files, however, which ocamlbuild cannot build out of the box.
I have tried writing a myocamlbuild.ml file (shown below after request) providing a rule from .cpp to .o and that fails with ocamlc complaining that it does not know what to do with a .cpp file (even when the compiler is set to g++ via command line flags).
open Ocamlbuild_plugin ;;
let ext_obj = !Options.ext_obj;;
let x_o = "%"-.-ext_obj;;
rule "ocaml C++ stubs: cpp -> o"
~prod:x_o
~dep:"%.cpp"
begin fun env _build ->
let c = env "%.cpp" in
let o = env x_o in
let comp =
if Tags.mem "native" (tags_of_pathname c) then !Options.ocamlopt else !Options.ocamlc in
let cc =
Cmd(S[comp; T(tags_of_pathname c++"c"++"compile"); A"-custom"; A"-cc"; A"g++"; A"-c"; Px c]) in
if Pathname.dirname o = Pathname.current_dir_name then cc
else Seq[cc; mv (Pathname.basename o) o]
end;;
The file libsoundness.clib consists of a bunch of .o files.
When I do ocamlbuild libsoundness.a I get the following output:
Finished, 0 targets (0 cached) in 00:00:00.
+ /usr/bin/ocamlc.opt -custom -cc g++ -c src/soundness/proof_aut.cpp
/usr/bin/ocamlc.opt: don't know what to do with src/soundness/proof_aut.cpp.
Usage: ocamlc <options> <files>
<snipped long list of ocamlc options>
The only other solution for C++ seems to be ocamlbuild-ctools whose website is defunct (I could not download any sources).
Any ideas?
最满意答案
比照 我对类似问题的回答 。
我推荐以下方法：
命名扩展名为.c c ++文件，以便ocamlc选择它们
告诉gcc这些实际上是带有-x c++ c ++文件
告诉ocamlbuild构建实际上依赖于.h文件（例如，在CSources字段中列出.h文件和.c文件）
不要忘记链接-lstdc++明确地导致gcc不会那样做C编译器
使用cxx_wrapped.h来获得真正的C ++感觉
利润！！
请参阅超级绑定作为此方法的示例。
cf. my answer to the similar question.
I recommend the following approach :
name c++ files with .c extension so that ocamlc picks them up
tell gcc that those are actually c++ files with -x c++
tell ocamlbuild that the build actually depends on .h files (e.g. list .h files together with .c in the CSources field in _oasis)
do not forget to link -lstdc++ explicitely cause gcc will not do that being a C compiler it is
use cxx_wrapped.h to get that real C++ feel
PROFIT!!
See hypertable bindings as an example of this approach.
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