qmake should handle the -- argument

$ /usr/local/lib/qt5/bin/qmake -spec /usr/local/lib/qt5/mkspecs/freebsd-$(ccver="$(c++ --version)"; case "$ccver" in *clang*) echo clang ;; *) echo g++ ;; esac)  QMAKE_CC="cc" QMAKE_CXX="c++"  QMAKE_LINK_C="cc" QMAKE_LINK_C_SHLIB="cc"  QMAKE_LINK="c++" QMAKE_LINK_SHLIB="c++"  QMAKE_CFLAGS="-O2 -pipe -fno-omit-frame-pointer  -fstack-protector-strong -fno-strict-aliasing "  QMAKE_CXXFLAGS="-O2 -pipe -fno-omit-frame-pointer -fstack-protector-strong -fno-strict-aliasing -fno-omit-frame-pointer  "  QMAKE_LFLAGS=" -fstack-protector-strong "  QMAKE_LIBS=""  QMAKE_CFLAGS_DEBUG=""  QMAKE_CFLAGS_RELEASE=""  QMAKE_CXXFLAGS_DEBUG=""  QMAKE_CXXFLAGS_RELEASE=""  PREFIX="/usr/local" CONFIG+="release"  CONFIG-="debug separate_debug_info" -recursive -- eql5.pro

Usage: /usr/local/lib/qt5/bin/qmake [mode] [options] [files]

QMake has two modes, one mode for generating project files based on
some heuristics, and the other for generating makefiles. Normally you
shouldn't need to specify a mode, as makefile generation is the default
mode for qmake, but you may use this to test qmake on an existing project

$ /usr/local/lib/qt5/bin/qmake -spec /usr/local/lib/qt5/mkspecs/freebsd-$(ccver="$(c++ --version)"; case "$ccver" in *clang*) echo clang ;; *) echo g++ ;; esac)  QMAKE_CC="cc" QMAKE_CXX="c++"  QMAKE_LINK_C="cc" QMAKE_LINK_C_SHLIB="cc"  QMAKE_LINK="c++" QMAKE_LINK_SHLIB="c++"  QMAKE_CFLAGS="-O2 -pipe -fno-omit-frame-pointer  -fstack-protector-strong -fno-strict-aliasing "  QMAKE_CXXFLAGS="-O2 -pipe -fno-omit-frame-pointer -fstack-protector-strong -fno-strict-aliasing -fno-omit-frame-pointer  "  QMAKE_LFLAGS=" -fstack-protector-strong "  QMAKE_LIBS=""  QMAKE_CFLAGS_DEBUG=""  QMAKE_CFLAGS_RELEASE=""  QMAKE_CXXFLAGS_DEBUG=""  QMAKE_CXXFLAGS_RELEASE=""  PREFIX="/usr/local" CONFIG+="release"  CONFIG-="debug separate_debug_info" -recursive eql5.pro