Hi, Bill!
Unfortunately this won't work because of:
- an Intel compiler bug/feature
- the way CMake positions flags in the command line
Namely, the -Dtarget_EXPORTS is always added first by CMake.
icpc -Dtarget_EXPORTS ...FLAGS... -use-pch my.pchi
Adding the flag by hand would put it at the end:
icpc ...FLAGS... -Dtarget_EXPORTS -create-pch my.pchi
For some reason, the Intel Compiler (as of v9.1.049) considers these
two to be different set of flags, hence issues the warning:
Warning #672: the command line options do not match those used ...
Still, I am glad I have a workaround, because PCH is very important
in our project, it reduces compile time considerably. =)
Alex Ciobanu
Bill Hoffman wrote:
Alexandru Ciobanu wrote:
Hi!
I am posting the workaround I have found.
Using the following command:
set_target_properties ( mytgt PROPERTIES LINK_FLAGS DEFINE_SYMBOL
"" )
I get:
icpc ...FLAGS... -create-pch my.pchi ( create )
icpc -D ...FLAGS... -use-pch my.pchi ( use )
which is ok with the intel compiler.
The -D seems to not bother it.
Alex Ciobanu
Seems like it would be easier to add the -D to the create step....
-Bill
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