Hi, all--
I ran into something peculiar last night while attempting to install the
canvas-draw egg. There was a linker error saying that the function
"cdInitContextPlus" was undefined. This didn't make sense at first, since I
knew the appropriate library, 'cdcontextplus,' was installed, and all
environment variables related to libraries were correct.
However, I noticed that the compiler command line as reported by
chicken-install was missing '-lcdcontextplus.' Then I checked the
canvas-draw.setup file, and I saw:
,@(cond-expand
[disable-canvas-draw-native
'()]
[else
(append
(if (find-library "cdx11" "cdContextNativeWindow")
'("-lcdx11") '())
(if (find-library "cdcontextplus" "cdInitContextPlus")
'("-lcdcontextplus") '()))])
Then I checked the docs for find-library, and found:
(find-library NAME PROC) [procedure]
Returns #t if the library named libNAME.[a|so] (unix) or NAME.lib
(windows) could be found by compiling and linking a test program.
I gather that .lib is the extension for static libraries on Windows,
whereas I had installed only the DLL version of the IM, CD, and IUP
libraries. So that seemed to explain the error. And indeed, I found that
when I replace the IF clause in the setup file with just
'("-lcdcontextplus")
The egg then compiled without error.
But I'm wondering why I needed to do that. Is there some reason why it
would be a bad idea, or would not work, for find-library to test DLLs as
well as static libs?
TIA for any info.
--
Matt Gushee
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