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digitalmars.D.learn - extern(C++) in win32.mak

reply Paul D Anderson <paul.d.anderson comcast.net> writes:
I don't understand the following line in dmd/src/win32.mak:

extern (C++) __gshared const(char)* ddoc_default = import 
("default_ddoc_theme.ddoc");

What does the word "import" mean in this context? I can't find 
any documentation on the use of import in this way, and the line 
fails to compile during the make.

The error message is:

file "default_ddoc_theme.ddoc" cannot be found or not in a path 
specified with -J

The file is in the directory dmd2/src/res, which is specified 
with -J../res in the build.

Is there anyone who knows the ins and outs of the makefile that 
can shed some light?

Thanks,
Paul
Feb 06 2018
next sibling parent reply rikki cattermole <rikki cattermole.co.nz> writes:
On 07/02/2018 6:05 AM, Paul D Anderson wrote:

 I don't understand the following line in dmd/src/win32.mak:
 
 extern (C++) __gshared const(char)* ddoc_default = import 
 ("default_ddoc_theme.ddoc");


That is a string import (-J).


 What does the word "import" mean in this context? I can't find any 
 documentation on the use of import in this way, and the line fails to 
 compile during the make.


https://dlang.org/spec/expression.html#import_expressions
Feb 06 2018
parent Paul D Anderson <paul.d.anderson comcast.net> writes:
On Wednesday, 7 February 2018 at 06:18:04 UTC, rikki cattermole 
wrote:

 On 07/02/2018 6:05 AM, Paul D Anderson wrote:

 I don't understand the following line in dmd/src/win32.mak:
 
 extern (C++) __gshared const(char)* ddoc_default = import 
 ("default_ddoc_theme.ddoc");


 That is a string import (-J).


 What does the word "import" mean in this context? I can't find 
 any documentation on the use of import in this way, and the 
 line fails to compile during the make.


 https://dlang.org/spec/expression.html#import_expressions


Thank you. I did not know that.

The error was caused by an over-zealous virus checker preventing 
some dmc executables from downloading.

Paul
Feb 07 2018
prev sibling parent reply Seb <seb wilzba.ch> writes:
On Wednesday, 7 February 2018 at 06:05:54 UTC, Paul D Anderson 
wrote:

 I don't understand the following line in dmd/src/win32.mak:

 extern (C++) __gshared const(char)* ddoc_default = import 
 ("default_ddoc_theme.ddoc");

 What does the word "import" mean in this context? I can't find 
 any documentation on the use of import in this way, and the 
 line fails to compile during the make.

 The error message is:

 file "default_ddoc_theme.ddoc" cannot be found or not in a path 
 specified with -J

 The file is in the directory dmd2/src/res, which is specified 
 with -J../res in the build.

 Is there anyone who knows the ins and outs of the makefile that 
 can shed some light?

 Thanks,
 Paul


I recommend cloning DMD directly from git if you want to compile 
from source. There are many CIs in place that ensure that it 
always works.
Feb 07 2018
parent reply Paul D Anderson <paul.d.anderson comcast.net> writes:
On Wednesday, 7 February 2018 at 08:28:23 UTC, Seb wrote:

 On Wednesday, 7 February 2018 at 06:05:54 UTC, Paul D Anderson 
 wrote:

 Is there anyone who knows the ins and outs of the makefile 
 that can shed some light?

 Thanks,
 Paul


 I recommend cloning DMD directly from git if you want to 
 compile from source. There are many CIs in place that ensure 
 that it always works.


I downloaded from git but still get an error, though it's no 
longer the ddoc file error.

At this line (316-7),
$G\lexer.lib: $(LEXER_SRCS) $(ROOT_SRCS) $(STRING_IMPORT_FILES) $G
	$(HOST_DC)  -of$   -vtls -lib -J$G $(DFLAGS) $(LEXER_SRCS) 
$(ROOT_SRCS)

I get
Error: 'of..\generated\windows\release\32\lexer.lib' not found

It looks to me as if at ' -of$  ', the '-of' flag is supposed to 
specify the output file, but is being interpreted as part of the 
filename.

Does anyone know what the problem is?

Paul
Feb 07 2018
parent reply Jacob Carlborg <doob me.com> writes:
On 2018-02-07 14:47, Paul D Anderson wrote:


 I get
 Error: 'of..\generated\windows\release\32\lexer.lib' not found


I don't think this file is built anymore.

-- 
/Jacob Carlborg
Feb 07 2018
parent Seb <seb wilzba.ch> writes:
On Wednesday, 7 February 2018 at 14:38:37 UTC, Jacob Carlborg 
wrote:

 On 2018-02-07 14:47, Paul D Anderson wrote:


 I get
 Error: 'of..\generated\windows\release\32\lexer.lib' not found


 I don't think this file is built anymore.


It's a leftover of the lexer experiment and AFAICT still built:

https://github.com/dlang/dmd/blob/master/src/win32.mak#L317
https://github.com/dlang/dmd/blob/master/src/win32.mak#L336


 It looks to me as if at ' -of$  ', the '-of' flag is supposed 
 to specify the output file, but is being interpreted as part of 
 the filename.


Yeah looks like it. What HOST_DC do you use (i.e. what DMD 
version)?
As mentioned, this file is built by various CIs, so it's pretty 
interesting to see that it doesn't work for you.
Feb 07 2018