llvm dev - Jun 2019 - I'm having problems compiling a program. Please help.

I'm not sure if this is the correct place to email for this kind of thing,
but I couldn't find any other contact info.  Also, I am new to llvm, so
please try to be understanding.

I keep getting an error when I try to compile a simple Hello World program
(as a test)(error included below).

The error is:

Clang: warning: unable to find a Visual Studio installation; try running
Clang from a developer command prompt [-Wmsvc-not-found]
hello.c:1:10: fatal error: 'string.h' file not found
#include <string.h>
         ^~~~~~~~~~
1 error generated

It looks as if Clang is looking for a Visual Studio installation for
missing C library headers (string.h, stdio.h, math.h, etc.). Does
Clang/llvm come with C library headers? If not, where can I get them?  I
don't want to install Visual Studio because (to my understanding) it's
proprietary software. I've included the program I'm trying to compile
(hello.c) below.


#include <string.h>
#include <stdio.h>
int main(void){
    print("Hello World!");
    return 0;
}

-- 



Please note new suite number
******
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Attorney at Law
207 N. Chestnut Street, Suite 240
Chaska, Minnesota 55318
(Parking is behind building)
Ph:  (952) 217-4473
Fax:  (952) 955-9648
Cell: (612) 384-9062
phylbean at gmail.com
www.phylbeanlaw.com

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AFAIK You have to install Windows 10 SDK which comes with Visual Studio. Clang
itself doesn’t provide headers.

But I dont know anything about Windows so I could be very wrong here

Zhang
> 在 2019年6月1日，20:17，Phyl Bean via llvm-dev <llvm-dev at lists.llvm.org>
写道：
> 
> 
> I'm not sure if this is the correct place to email for this kind of
thing, but I couldn't find any other contact info.  Also, I am new to llvm,
so please try to be understanding.
> 
> I keep getting an error when I try to compile a simple Hello World program
(as a test)(error included below).
> 
> The error is:
> 
> Clang: warning: unable to find a Visual Studio installation; try running
Clang from a developer command prompt [-Wmsvc-not-found]
> hello.c:1:10: fatal error: 'string.h' file not found
> #include <string.h>
>          ^~~~~~~~~~
> 1 error generated
> 
> It looks as if Clang is looking for a Visual Studio installation for
missing C library headers (string.h, stdio.h, math.h, etc.). Does Clang/llvm
come with C library headers? If not, where can I get them?  I don't want to
install Visual Studio because (to my understanding) it's proprietary
software. I've included the program I'm trying to compile (hello.c)
below.
> 
> 
> #include <string.h>
> #include <stdio.h>
> int main(void){
>     print("Hello World!");
>     return 0;
> }
> 
> -- 
> 
> 
> 
> Please note new suite number
> ******
> Phyl Bean 
> Attorney at Law 
> 207 N. Chestnut Street, Suite 240 
> Chaska, Minnesota 55318
> (Parking is behind building)
> Ph:  (952) 217-4473
> Fax:  (952) 955-9648
> Cell: (612) 384-9062 
> phylbean at gmail.com
> www.phylbeanlaw.com
> 
> CONFIDENTIALITY NOTICE: The contents of this email message and any
attachments are intended solely for the addressee(s) and may contain
confidential and/or privileged information and may be legally protected from
disclosure. If you are not the intended recipient of this message or their
agent, or if this message has been addressed to you in error, please immediately
alert the sender by reply email and then delete this message and any
attachments. If you are not the intended recipient, you are hereby notified that
any use, dissemination, copying, or storage of this message or its attachments
is strictly prohibited.
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
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You need to install Visual Studio for headers and libraries.  It's possible
to make clang work with LLVM's C++ standard library (libc++), but it is not
trivial, and that *still* won't get you a C Runtime Library.  Note that
while Visual Studio is proprietary software, Visual Studio *Community
Edition* has a quite permissive license.

https://visualstudio.microsoft.com/dev-essentials/



On Sat, Jun 1, 2019 at 5:58 PM mayuyu.io via llvm-dev <
llvm-dev at lists.llvm.org> wrote:
> AFAIK You have to install Windows 10 SDK which comes with Visual Studio.
> Clang itself doesn’t provide headers.
>
> But I dont know anything about Windows so I could be very wrong here
>
> Zhang
>
> 在 2019年6月1日，20:17，Phyl Bean via llvm-dev <llvm-dev at lists.llvm.org>
写道：
>
>
> I'm not sure if this is the correct place to email for this kind of
thing,
> but I couldn't find any other contact info.  Also, I am new to llvm, so
> please try to be understanding.
>
> I keep getting an error when I try to compile a simple Hello World program
> (as a test)(error included below).
>
> The error is:
>
> Clang: warning: unable to find a Visual Studio installation; try running
> Clang from a developer command prompt [-Wmsvc-not-found]
> hello.c:1:10: fatal error: 'string.h' file not found
> #include <string.h>
>          ^~~~~~~~~~
> 1 error generated
>
> It looks as if Clang is looking for a Visual Studio installation for
> missing C library headers (string.h, stdio.h, math.h, etc.). Does
> Clang/llvm come with C library headers? If not, where can I get them?  I
> don't want to install Visual Studio because (to my understanding)
it's
> proprietary software. I've included the program I'm trying to
compile
> (hello.c) below.
>
>
> #include <string.h>
> #include <stdio.h>
> int main(void){
>     print("Hello World!");
>     return 0;
> }
>
> --
>
>
>
> Please note new suite number
> ******
> Phyl Bean
> Attorney at Law
> 207 N. Chestnut Street, Suite 240
> Chaska, Minnesota 55318
> (Parking is behind building)
> Ph:  (952) 217-4473
> Fax:  (952) 955-9648
> Cell: (612) 384-9062
> phylbean at gmail.com
> www.phylbeanlaw.com
>
> CONFIDENTIALITY NOTICE: The contents of this email message and any
> attachments are intended solely for the addressee(s) and may contain
> confidential and/or privileged information and may be legally protected
> from disclosure. If you are not the intended recipient of this message or
> their agent, or if this message has been addressed to you in error, please
> immediately alert the sender by reply email and then delete this message
> and any attachments. If you are not the intended recipient, you are hereby
> notified that any use, dissemination, copying, or storage of this message
> or its attachments is strictly prohibited.
>
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>
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Visual Studio comes with a batch file vcvarsall.bat that sets the
environment variables containing the paths to headers and libraries.
You can select the environment from the start menu, e.g. "Developer
Command Prompt for VS 2019" or "x64_x86 Cross Tools Command Prompt for
VS 2017".

Michael

Am Sa., 1. Juni 2019 um 17:17 Uhr schrieb Phyl Bean via llvm-dev
<llvm-dev at lists.llvm.org>:
>
>
> I'm not sure if this is the correct place to email for this kind of
thing, but I couldn't find any other contact info.  Also, I am new to llvm,
so please try to be understanding.
>
> I keep getting an error when I try to compile a simple Hello World program
(as a test)(error included below).
>
> The error is:
>
> Clang: warning: unable to find a Visual Studio installation; try running
Clang from a developer command prompt [-Wmsvc-not-found]
> hello.c:1:10: fatal error: 'string.h' file not found
> #include <string.h>
>          ^~~~~~~~~~
> 1 error generated
>
> It looks as if Clang is looking for a Visual Studio installation for
missing C library headers (string.h, stdio.h, math.h, etc.). Does Clang/llvm
come with C library headers? If not, where can I get them?  I don't want to
install Visual Studio because (to my understanding) it's proprietary
software. I've included the program I'm trying to compile (hello.c)
below.
>
>
> #include <string.h>
> #include <stdio.h>
> int main(void){
>     print("Hello World!");
>     return 0;
> }
>
> --
>
>
>
> Please note new suite number
> ******
> Phyl Bean
> Attorney at Law
> 207 N. Chestnut Street, Suite 240
> Chaska, Minnesota 55318
> (Parking is behind building)
> Ph:  (952) 217-4473
> Fax:  (952) 955-9648
> Cell: (612) 384-9062
> phylbean at gmail.com
> www.phylbeanlaw.com
>
> CONFIDENTIALITY NOTICE: The contents of this email message and any
attachments are intended solely for the addressee(s) and may contain
confidential and/or privileged information and may be legally protected from
disclosure. If you are not the intended recipient of this message or their
agent, or if this message has been addressed to you in error, please immediately
alert the sender by reply email and then delete this message and any
attachments. If you are not the intended recipient, you are hereby notified that
any use, dissemination, copying, or storage of this message or its attachments
is strictly prohibited.
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev