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ocamlmklib's -L option does not work as expected with Microsoft Visual C compiler #5659

vicuna opened this issue Jun 21, 2012 · 2 comments


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commented Jun 21, 2012

Original bug ID: 5659
Reporter: db
Status: closed (set by @damiendoligez on 2012-07-17T18:33:08Z)
Resolution: fixed
Priority: normal
Severity: minor
Version: 3.12.1
Target version: 4.00.0+dev
Fixed in version: 4.00.0+dev
Category: platform support (windows, cross-compilation, etc)

Bug description

Consider the following scenario (all files are attached below):


C:\Work\Ocaml\Bug\ocamlmklib>ocamlc -c foo_stubs.c

C:\Work\Ocaml\Bug\ocamlmklib>ocamlmklib -verbose -Lc:/Ocaml/lib foo_stubs
.obj -o foo

  • flexlink -merge-manifest -o .\dllfoo.dll foo_stubs.obj -Lc:/Ocaml/lib

  • link /lib /nologo /out:.\libfoo.lib foo_stubs.obj

  • ocamlc -a -o foo.cma -dllib -lfoo -cclib -lfoo -ccopt -Lc:/Ocaml/lib

  • ocamlopt -a -o foo.cmxa -cclib -lfoo -ccopt -Lc:/Ocaml/lib

C:\Work\Ocaml\Bug\ocamlmklib>ocamlc -verbose foo.cma -output-obj -o bar.obj

  • cl /nologo -D_CRT_SECURE_NO_DEPRECATE /Ox /MD -c -Lc:/Ocaml/lib -I"C:\Ocaml\lib" "bar.c"
    cl : Command line warning D9002 : ignoring unknown option '-Lc:/Ocaml/lib' bar.c

Note strange "-ccopt -Lc:/Ocaml/lib" that ocamlmklib generates and that is not recognized later by Microsoft C compiler. Why -L path is put into -ccopt?

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commented Jul 12, 2012

Comment author: @damiendoligez

For reference, I have attached the patch proposed by Fabrice.


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commented Jul 17, 2012

Comment author: @damiendoligez

Tested and applied Fabrice's patch in 4.00 (commit 12723) and trunk (commit 12724).

@vicuna vicuna closed this Jul 17, 2012

@vicuna vicuna added this to the 4.00.0 milestone Mar 14, 2019

@vicuna vicuna added the bug label Mar 20, 2019

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