https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71286
Bug ID: 71286
Summary: 6.1.0: compiling djgpp programs with LTO emits
"visibility attribute not supported in this
configuration" warnings
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
Severity: minor
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: felix.von.s at posteo dot de
Target Milestone: ---
Host: x86_64-pc-linux-gnu
Target: i686-pc-msdosdjgpp
Build: x86_64-pc-linux-gnu
Compiling djgpp programs with LTO enabled makes gcc emit diagnostics like:
error: visibility attribute not supported in this configuration; ignored
[-Werror=attributes]
The source code doesn't even contain __attribute__((visibility(...))) anywhere,
however.
I believe a similar problem is worked around in the MinGW target by defining a
custom TARGET_ASM_ASSEMBLE_VISIBILITY.
(Also, getting LTO to work in the first place required me to apply this:)
--- configure
+++ configure
@@ -6177,7 +6177,7 @@
# Among non-ELF, only Windows platforms support the lto-plugin so far.
# Build it unless LTO was explicitly disabled.
case $target in
- *-cygwin* | *-mingw*) build_lto_plugin=$enable_lto ;;
+ *-cygwin* | *-mingw* | *djgpp*) build_lto_plugin=$enable_lto ;;
*) ;;
esac
(The comment needs updating too, by the way.)
