How do you use jextract for two or more header files?

[Carl Dea]

Paul,
Excellent!
Yes others have mentioned this technique.
Although it works rather well, the imports will have a header’s name:
For example:
foo.h 

After jextract it’s 

import org.unix.foo_h.*;

Not a deal breaker, but just thought it might be noted in docs.

Thank you,
Carl

Sent from my iPhone

> On Aug 23, 2021, at 2:13 PM, Paul Sandoz <paul.sandoz at oracle.com> wrote:
> 
> Hi Carl,
> 
> Generating separately will overwrite common generated artifacts (in this case the constants classes).
> 
> Create your own header file with the following content:
> 
> #include <stdio.h>
> #include <time.h>
> 
> Then run jextract using that header file as input.
> 
> Paul.
> 
>> On Aug 22, 2021, at 9:25 PM, carl dea <carl.dea at gmail.com> wrote:
>> 
>> Panama Dev team,
>> 
>> I'm trying to use jextract for stdio.h and time.h, but getting compile
>> issues when the target (-t) name space is the same such as *-t org.unix*
>> *jextract stdio.h*
>> 
>> # jextract stdio.h
>> jextract --source -d generated/src -t org.unix \
>> -I /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include
>> \
>> /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/stdio.h
>> 
>> *jextract time.h*
>> 
>> # jextract time.h
>> jextract --source -d generated/src -t org.unix \
>> -I /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include
>> \
>>  /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/time.h
>> 
>> *Compile source*
>> 
>> javac -d classes generated/src/org/unix/*.java
>> 
>> 
>> *Compile Error*
>> The following compile errors (87 errors)
>> generated/src/org/unix/stdio_h.java:732: error: cannot find symbol
>>       return
>> RuntimeHelper.requireNonNull(constants$0.renameat$MH,"renameat");
>>                                                      ^
>> symbol:   variable renameat$MH
>> location: class constants$0
>> generated/src/org/unix/stdio_h.java:735: error: cannot find symbol
>> ...
>> 
>> *Workaround (change namespace)*
>> My workaround is making time.h 's target namespace to *-t org.unix.time*.
>> When I'm in the IDE and using Panama the source code looks like the
>> following
>> 
>> import static org.unix.stdio_h.*;
>> import static org.unix.time.time_h.*;
>> 
>> import org.unix.time.tm;
>> ...
>> // more code
>> localtime_r(now2, pTmStruct);
>> 
>> Is there a better way to perform a jextract on two more headers?
>> 
>> This example uses both stdio.h and time.h
>> https://github.com/carldea/panama4newbies/blob/main/part03/src/PanamaTime.java
>> 
>> 
>> Thank you,
>> Carl
>> 
>> -- 
>> *Carl Dea*
>> Email: carldea at gmail.com
>> Website: https://carlfx.wordpress.com
>> Twitter: @carldea <https://twitter.com/carldea>
>