[Vm-dev] issue with cmake
Levente Uzonyi
leves at elte.hu
Fri Jan 22 12:49:01 UTC 2010
On Fri, 22 Jan 2010, Levente Uzonyi wrote:
>
> On Thu, 21 Jan 2010, John McIntosh wrote:
>
>> maybe some can explain the magic, or fix the script?
>
> There's a bug in platforms/unix/CMakeLists.txt. At line 29, there's
> STRING (REGEX REPLACE "OPT--(.*)" "\\1" var ${opt})
> This line splits the arguments in an unexpected way.
> If you replace the next line
> MESSAGE (STATUS "Setting ${var}=${${opt}}")
> with
> MESSAGE (STATUS "Setting ${var} to ${${opt}}")
> the error will be obvious.
> CFLAGS will be unset, so it will fall back to the default.
It turned out to be a CMake bug/feature.
If opt contains an = character, say opt is "foo=bar" then ${opt} will be
"foo" and ${$opt} will be "bar". If opt contains more than one =
character, the last will count (dumb, dumb, dumb...), so if opt is
"CFLAGS=-O3 -march=native" then $opt will be "CFLAGS=-O3 -march" and
${$opt} will be "native".
Levente
>
>
> Levente
>
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