message: build, qt, refactor: Drop sed commands for win32-g++/qmake.conf
diff: @@ -148,6 +148,9 @@ $(package)_config_opts_s390x_linux = -platform linux-g++ -xplatform bitcoin-linu
  $(package)_config_opts_mingw32 = -no-opengl
  $(package)_config_opts_mingw32 += -no-dbus
  $(package)_config_opts_mingw32 += -xplatform win32-g++
  +$(package)_config_opts_mingw32 += "QMAKE_CFLAGS = '$($(package)_cflags) $($(package)_cppflags)'"
  +$(package)_config_opts_mingw32 += "QMAKE_CXXFLAGS = '$($(package)_cflags) $($(package)_cppflags)'"
  +$(package)_config_opts_mingw32 += "QMAKE_LFLAGS = '$($(package)_ldflags)'"
  $(package)_config_opts_mingw32 += -device-option CROSS_COMPILE="$(host)-"
  $(package)_config_opts_mingw32 += -pch
  @@ -240,9 +243,6 @@ define $(package)_preprocess_cmds
  echo "!host_build: QMAKE_CFLAGS += $($(package)_cflags) $($(package)_cppflags)" >> qtbase/mkspecs/common/gcc-base.conf && \
  echo "!host_build: QMAKE_CXXFLAGS += $($(package)_cxxflags) $($(package)_cppflags)" >> qtbase/mkspecs/common/gcc-base.conf && \
  echo "!host_build: QMAKE_LFLAGS += $($(package)_ldflags)" >> qtbase/mkspecs/common/gcc-base.conf && \
  - sed -i.old "s|QMAKE_CFLAGS += |!host_build: QMAKE_CFLAGS = $($(package)_cflags) $($(package)_cppflags) |" qtbase/mkspecs/win32-g++/qmake.conf && \
  - sed -i.old "s|QMAKE_CXXFLAGS += |!host_build: QMAKE_CXXFLAGS = $($(package)_cxxflags) $($(package)_cppflags) |" qtbase/mkspecs/win32-g++/qmake.conf && \
  - sed -i.old "0,/^QMAKE_LFLAGS_/s|^QMAKE_LFLAGS_|!host_build: QMAKE_LFLAGS = $($(package)_ldflags)\n&|" qtbase/mkspecs/win32-g++/qmake.conf && \
  sed -i.old "s|QMAKE_CC = \$$$$\$$$${CROSS_COMPILE}clang|QMAKE_CC = $($(package)_cc)|" qtbase/mkspecs/common/clang.conf && \
  sed -i.old "s|QMAKE_CXX = \$$$$\$$$${CROSS_COMPILE}clang++|QMAKE_CXX = $($(package)_cxx)|" qtbase/mkspecs/common/clang.conf && \
  sed -i.old "s/LIBRARY_PATH/(CROSS_)?\0/g" qtbase/mkspecs/features/toolchain.prf
  