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From: "Soegtrop, Michael" <michael.soegtrop@intel.com>
To: "caml-list@inria.fr" <caml-list@inria.fr>
Thread-Topic: Building ocamlbuild with opam fails after opam switch <version>
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Date: Sat, 25 Jun 2016 13:57:35 +0000
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Subject: [Caml-list] Building ocamlbuild with opam fails after opam switch
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Dear OCaml Users,

Opam works fine for me with the system installed OCaml, but after an opam s=
witch I cannot build ocamlbuild or any package depending on it any more.

Building ocamlbuild fails because it explicitly checks if there is already =
a system installed ocamlbuild:

# ERROR: Preinstalled ocamlbuild detected at /usr/local/lib/ocaml/ocamlbuild
# Installation aborted; if you want to bypass this safety check, pass CHECK=
_IF_PREINSTALLED=3Dfalse to make
# make: *** [Makefile:333: check-if-preinstalled] Error 2

Of cause I can just follow this advice and remove this check, but I wonder =
how others handle this.

Best regards,

Michael

Intel Deutschland GmbH
Registered Address: Am Campeon 10-12, 85579 Neubiberg, Germany
Tel: +49 89 99 8853-0, www.intel.de
Managing Directors: Christin Eisenschmid, Christian Lamprechter
Chairperson of the Supervisory Board: Nicole Lau
Registered Office: Munich
Commercial Register: Amtsgericht Muenchen HRB 186928

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<p class=3D"MsoNormal">Dear OCaml Users,<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Opam works fine for me with the system installed OCa=
ml, but after an opam switch I cannot build ocamlbuild or any package depen=
ding on it any more.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Building ocamlbuild fails because it explicitly chec=
ks if there is already a system installed ocamlbuild:<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"># ERROR: Preinstalled ocamlbuild detected at /usr/lo=
cal/lib/ocaml/ocamlbuild<o:p></o:p></p>
<p class=3D"MsoNormal"># Installation aborted; if you want to bypass this s=
afety check, pass CHECK_IF_PREINSTALLED=3Dfalse to make<o:p></o:p></p>
<p class=3D"MsoNormal"># make: *** [Makefile:333: check-if-preinstalled] Er=
ror 2<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Of cause I can just follow this advice and remove th=
is check, but I wonder how others handle this.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Best regards,<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Michael<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
<p><font style=3D"font-size: 9px;">Intel Deutschland GmbH<br>
Registered Address: Am Campeon 10-12, 85579 Neubiberg, Germany<br>
Tel: +49 89 99 8853-0, www.intel.de<br>
Managing Directors: Christin Eisenschmid, Christian Lamprechter<br>
Chairperson of the Supervisory Board: Nicole Lau<br>
Registered Office: Munich<br>
Commercial Register: Amtsgericht Muenchen HRB 186928</font><br>
</p>
</body>
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