error in cmake IF statement

Question

I have a if statement in my .cmake file which reads like:

if( (NOT ${GCC_VERSION} GREATER some_version ) AND something EQUAL somethingelse)
    #todo ...
endif()

I need the NOT only for the first check of the statement.

I get the following error:

CMake Error: Error in cmake code at
/.../XXX.cmake:123:
Parse error.  Function missing ending ")".  Instead found left paren with text "(".

Appreciate your kind help.

I cannot reproduce this locally. Which CMake version? Can you provide a stand-alone [mcve]? — Angew is no longer proud of SO, Mar 07 '17 at 10:48
Possible duplicate of [CMake error near if: "if given arguments" followed by parantheses, "NOT", "EUQALS" and similar](http://stackoverflow.com/questions/39707772/cmake-error-near-if-if-given-arguments-followed-by-parantheses-not-euqal) — usr1234567, Mar 07 '17 at 21:19

score 2 · Accepted Answer · edited May 23 '17 at 12:31

GCC_VERSION variable could be empty, resulting in an invalid if statement.

Put ${GCC_VERSION} in quotes (CMake only knows strings) or don't dereference the variable (which is an equivalent operation) to be on the safe side:

if( NOT "${GCC_VERSION}" GREATER some_version )

or

if( NOT GCC_VERSION GREATER some_version )

References

error in cmake IF statement

1 Answers1