Fix configure test for gcc 14: avoid implicit funcition decl. for main() #33
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Change the implicit return type of int in the embeded test.c program in
the configure script to explicit "int main()".
This was a warning in previous gcc versions, but in gcc 14 this produces
an error resulting the LIBS variable being empty in the generated
Make.conf, and compile errors due to missing jpeg support, etc.
from bad config.log:
...
infodir = /usr/local/info
$$~test.c:1:1: error: return type defaults to 'int' [-Wimplicit-int]
1 | main()
| ^~~~
libjpeg: no
$$~test.c:1:1: error: return type defaults to 'int' [-Wimplicit-int]
1 | main()
| ^~~~
libpng: no
bmp: yes
fb: /dev/fb0
LIBS =
...
Signed-off-by: Geoff Parker <geoffrey.parker@arthrex.com>
joergneulist
approved these changes
Dec 18, 2025
joergneulist
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It's a simple change and I arrived at the same solution independently. Looks good!
|
Thank you @kk6ho! I just made the same fix and wanted to place a pull request :-) So I absolutely second merging this, @godspeed1989 |
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Change the implicit return type of int in the embeded test.c program in the configure script to explicit "int main()".
This was a warning in previous gcc versions, but in gcc 14 this produces an error resulting the LIBS variable being empty in the generated Make.conf, and compile errors due to missing jpeg support, etc.
from bad config.log:
infodir = /usr/local/info
$$~test.c:1:1: error: return type defaults to 'int' [-Wimplicit-int]
1 | main()
| ^~~~
libjpeg: no
$$~test.c:1:1: error: return type defaults to 'int' [-Wimplicit-int]
1 | main()
| ^~~~
libpng: no
bmp: yes
fb: /dev/fb0
LIBS =
...