My test, and the one before it, looks like …
configure:72921: checking for munmap
configure:72921: gcc -o conftest -g -O2 -D_THREAD_SAFE -pthread -I/usr/local/opt/readline/include -I/usr/local/opt/sqlite/include -I/usr/local/opt/openssl/include -I/usr/local/opt/gettext/include -I/usr/local/opt/icu4c/include -I/usr/local/opt/qt/include -I/usr/local/opt/sundials27/include -I/usr/local/opt/zlib/include -L/usr/local/opt/readline/lib -L/usr/local/opt/sqlite/lib -L/usr/local/opt/openssl/lib -L/usr/local/opt/bison/lib -L/usr/local/opt/gettext/lib -L/usr/local/opt/libffi/lib -L/usr/local/opt/icu4c/lib -F/usr/local/opt/qt/lib -L/usr/local/opt/sundials27/lib -L/usr/local/opt/zlib/lib -L/usr/local/opt/qrupdate/lib conftest.c -lm >&5
configure:72921: $? = 0
configure:72921: result: yes
configure:72939: checking for QAbstractItemModel::beginResetModel in <QAbstractItemModel>
configure:72994: g++ -std=gnu++11 -c -fPIC -g -O2 -D_THREAD_SAFE -pthread -I/usr/local/Cellar/qt/5.12.0/lib/QtNetwork.framework/Headers -I/usr/local/Cellar/qt/5.12.0/lib/QtPrintSupport.framework/Headers -I/usr/local/Cellar/qt/5.12.0/lib/QtHelp.framework/Headers -I/usr/local/Cellar/qt/5.12.0/lib/QtWidgets.framework/Headers -I/usr/local/Cellar/qt/5.12.0/lib/QtGui.framework/Headers -I/usr/local/Cellar/qt/5.12.0/lib/QtSql.framework/Headers -I/usr/local/Cellar/qt/5.12.0/lib/QtXml.framework/Headers -I/usr/local/Cellar/qt/5.12.0/lib/QtCore.framework/Headers -fPIC -I/usr/local/opt/readline/include -I/usr/local/opt/sqlite/include -I/usr/local/opt/openssl/include -I/usr/local/opt/gettext/include -I/usr/local/opt/icu4c/include -I/usr/local/opt/qt/include -I/usr/local/opt/sundials27/include -I/usr/local/opt/zlib/include conftest.cpp >&5
configure:72994: $? = 0
configure:73010: result: yes
You can see that both "-I/usr/local/opt/qt/include" and the "-F/usr/local/opt/qt/lib" are present in the check for munmap and QAbstractItemModel::beginResetModel. Please confirm each are present in your check for munmap.
Ben
My test looks like this:
configure:72921: checking for munmap
configure:72921: gcc -o conftest -g -O0 -D_THREAD_SAFE -pthread -I/usr/local/opt/readline/include -I/usr/local/opt/sqlite/include -I/usr/local/opt/openssl/include -I/usr/local/opt/gettext/include -I/usr/local/opt/icu4c/include -I/usr/local/opt/sundials27/include -I/usr/local/opt/zlib/include -L/usr/local/opt/readline/lib -L/usr/local/opt/sqlite/lib -L/usr/local/opt/openssl/lib -L/usr/local/opt/bison/lib -L/usr/local/opt/gettext/lib -L/usr/local/opt/libffi/lib -L/usr/local/opt/icu4c/lib -L/usr/local/opt/texinfo/lib -F/usr/local/opt/qt/lib -L/usr/local/opt/sundials27/lib -L/usr/local/opt/zlib/lib -L/usr/local/opt/qrupdate/lib conftest.c -lm >&5
ld: warning: directory not found for option '-L/usr/local/opt/texinfo/lib'
ld: warning: directory not found for option '-L/usr/local/opt/sundials27/lib'
ld: warning: directory not found for option '-L/usr/local/opt/zlib/lib'
configure:72921: $? = 0
configure:72921: result: yes
configure:72939: checking for QAbstractItemModel::beginResetModel in <QAbstractItemModel>
configure:72994: g++ -std=gnu++11 -c -fPIC -g -O0 -D_THREAD_SAFE -pthread -I/usr/local/Cellar/qt/5.12.0/lib/QtNetwork.framework/Headers -I/usr/local/Cellar/qt/5.12.0/lib/QtPrintSupport.framework/Headers -I/usr/local/Cellar/qt/5.12.0/lib/QtHelp.framework/Headers -I/usr/local/Cellar/qt/5.12.0/lib/QtWidgets.framework/Headers -I/usr/local/Cellar/qt/5.12.0/lib/QtGui.framework/Headers -I/usr/local/Cellar/qt/5.12.0/lib/QtSql.framework/Headers -I/usr/local/Cellar/qt/5.12.0/lib/QtXml.framework/Headers -I/usr/local/Cellar/qt/5.12.0/lib/QtCore.framework/Headers -fPIC -I/usr/local/opt/readline/include -I/usr/local/opt/sqlite/include -I/usr/local/opt/openssl/include -I/usr/local/opt/gettext/include -I/usr/local/opt/icu4c/include -I/usr/local/opt/sundials27/include -I/usr/local/opt/zlib/include conftest.cpp >&5
"-I/usr/local/opt/qt/include" not being present in neither munmap nor QAbstractItemModel::beginResetModel. What does this mean?