tigervnc y cmake en hpux: ¿por qué no puede encontrar zlib?

Utilizo este script para configurar tigervnc en hpux cmake es el último 3.4.3 zlib es el último 2.8 Pero el script falla, ¿por qué?

export PATH=$PATH:/opt/cmake/bin/
export CC="/usr/local/bin/gcc"
export HPUXLDFLAGS='-L/usr/local/lib/hpux32'
export HPUXCFLAGS='-I/usr/local/include' 
export LDFLAGS="$HPUXLDFLAGS"
export CFLAGS="$HPUXCFLAGS"

cmake \
    -G "Unix Makefiles" \
    -DCMAKE_C_FLAGS:STRING="$HPUXCFLAGS" \
    -DCMAKE_LD_FLAGS:STRING="$HPUXLDFLAGS" \
    -DCMAKE_CXX_FLAGS:STRING="$HPUXCFLAGS" \
    -Wno-dev \
    -DCMAKE_INSTALL_PREFIX=/opt/tigervnc \
    -DMAN_INSTALL_DIR=/opt/tigervnc/man \
    -DSYSCONF_INSTALL_DIR=/etc/opt/tigervnc \
    -DENABLE_PAM:BOOL=OFF \
    -DBUILD_JAVA:BOOL=ON \
    ..

El script falla con esas líneas

-- Looking for IceConnectionNumber in ICE - found
-- Found X11: /usr/lib/hpux32/libX11.so
CMake Error at /opt/cmake/share/cmake-3.4/Modules/FindPackageHandleStandardArgs.cmake:148 (message):
  Could NOT find ZLIB (missing: ZLIB_LIBRARY) (found version "1.2.8")
Call Stack (most recent call first):
  /opt/cmake/share/cmake-3.4/Modules/FindPackageHandleStandardArgs.cmake:388 (_FPHSA_FAILURE_MESSAGE)
  /opt/cmake/share/cmake-3.4/Modules/FindZLIB.cmake:124 (FIND_PACKAGE_HANDLE_STANDARD_ARGS)
  CMakeLists.txt:125 (find_package)

¿Está mal mi guión?

hp-ux cmake

— elbarna
fuente

Solución encontrada, debe usar esto en lugar de exportar

cmake \
    -G "Unix Makefiles" \
    -DCMAKE_C_FLAGS:STRING="$HPUXCFLAGS" \
    -DCMAKE_LD_FLAGS:STRING="$HPUXLDFLAGS" \
    -DCMAKE_CXX_FLAGS:STRING="$HPUXCFLAGS" \
    -DZLIB_LIBRARY="/usr/local/lib/hpux32" \
    -DZLIB_INCLUDE_DIR="/usr/local/include" \
    -Wno-dev \
    -DCMAKE_INSTALL_PREFIX=/opt/tigervnc \
    -DMAN_INSTALL_DIR=/opt/tigervnc/man \
    -DSYSCONF_INSTALL_DIR=/etc/opt/tigervnc \
    -DENABLE_PAM:BOOL=OFF \
    -DBUILD_JAVA:BOOL=ON \

— elbarna
fuente