Trunk doesn't compile without BigTiff support:

[avar]

Revision [16105] introduced a variable on line 443 of frmts/gtiff/gt_overview.cpp that is compiled if BIGTIFF_SUPPORT isn't enabled, but the eType variable is never defined:

make[2]: Entering directory `/home/avar/src/gdal/frmts/gtiff'
/bin/sh /home/avar/src/gdal/libtool --mode=compile --tag=CXX g++ -g -O2  -Wall  -I/home/avar/src/gdal/port -I/home/avar/src/gdal/gcore -I/home/avar/src/gdal/alg -I/home/avar/src/gdal/ogr -I/home/avar/src/gdal/ogr/ogrsf_frmts -I/usr/include/geotiff  -DOGR_ENABLED -I/home/avar/src/gdal/port  -c -o ../o/gt_overview.lo gt_overview.cpp
libtool: compile:  g++ -g -O2 -Wall -I/home/avar/src/gdal/port -I/home/avar/src/gdal/gcore -I/home/avar/src/gdal/alg -I/home/avar/src/gdal/ogr -I/home/avar/src/gdal/ogr/ogrsf_frmts -I/usr/include/geotiff -DOGR_ENABLED -I/home/avar/src/gdal/port -c gt_overview.cpp  -fPIC -DPIC -o ../o/.libs/gt_overview.o
gt_overview.cpp: In function 'CPLErr GTIFFBuildOverviews(const char*, int, GDALRasterBand**, int, int*, const char*, int (*)(double, const char*, void*), void*)':
gt_overview.cpp:443: error: 'eType' was not declared in this scope
make[2]: *** [../o/gt_overview.lo] Error 1

[avar]

FWIW I did

sh autogen.sh

before running ./configure

[Even Rouault]

Good catch. Thanks. Fixed in r16175