When the line that requests explicit template instantation is before the actual
template class method definitions, g++ 4.0 and 4.1 fail to generate the code
for those methods, resulting in linking errors later. But gcc 3.3 and 3.4 both
have no problems (as well as icc and msvc).
Moving the "template class foo<5>;" line after the definitions fixes this. I'm
not sure what the C++ standard says about that...
-- Steps to reproduce --
Grab the attached simple testcase. Issue "make"
-- Actual results --
Linking fails.
-- Expected results --
Should link successfully.
-- Build date and platform --
gcc 4.1.0 (fedora core 5 default)
-- Additional builds and platforms --
- Also occurs on -
gcc 4.0.1 (fedora core 4 defulat) - DOESN't work
- Doesn't occur on -
gcc 3.3.6 (slackware 10.2 default)
gcc 3.4 (fedora core 3 default)
--
Summary: No code generated for Explicit Template Instantations on
gcc 4.0+
Product: gcc
Version: 4.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: skalaren_alpinist at abv dot bg
GCC build triplet: i386-pc-gnu
GCC host triplet: i386-pc-gnu
GCC target triplet: i386-pc-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27175
