qmake can't evaluate a proper variable

问题

I'd like to share my build version in the app but I can't get that thing to work... this is a part of my .pro file...

LITERAL_HASH = "foo";
BUILD = "$${LITERAL_HASH}{\"sexy Installer\"},(0x12345678),1,0,3";
DEPLOYMENT.installer_header = $$(BUILD);

message(bar .$$(BUILD).)

and when I run qmake from Qt menu the output is:

Project MESSAGE: bar ..

I'm doing everything according to the docs and still that variable seems to be empty...

回答1:

Use $${BUILD} instead of $$(BUILD). The $() operator accesses environment variables, not .pro file variables.

来源：https://stackoverflow.com/questions/4215257/qmake-cant-evaluate-a-proper-variable