[build] fix for zlib and BPF issue on CentOS 7

deps/zlib-1.3/CMakeLists.txt

@@ -5,6 +5,7 @@ project(zlib C)
 
 set(VERSION "1.3")
 
+option(BUILD_SAMPLES "Build minigzip and test" OFF)
 set(INSTALL_BIN_DIR "${CMAKE_INSTALL_PREFIX}/bin" CACHE PATH "Installation directory for executables")
 set(INSTALL_LIB_DIR "${CMAKE_INSTALL_PREFIX}/lib" CACHE PATH "Installation directory for libraries")
 set(INSTALL_INC_DIR "${CMAKE_INSTALL_PREFIX}/include" CACHE PATH "Installation directory for headers")
@@ -193,7 +194,7 @@ endif()
 #============================================================================
 # Example binaries
 #============================================================================
-
+if(BUILD_SAMPLES)
 add_executable(example test/example.c)
 target_link_libraries(example zlib)
 add_test(example example)
@@ -211,3 +212,4 @@ if(HAVE_OFF64_T)
     target_link_libraries(minigzip64 zlib)
     set_target_properties(minigzip64 PROPERTIES COMPILE_FLAGS "-D_FILE_OFFSET_BITS=64")
 endif()
+endif(BUILD_SAMPLES)

rpm/pipy.spec

@@ -60,12 +60,14 @@ source /opt/rh/rh-nodejs14/enable
 %endif
 %if 0%{?rhel} == 7
 source /opt/rh/llvm-toolset-7.0/enable
+PIPY_BPF=OFF
 %endif
 cd build
 CXX=clang++ CC=clang cmake3 \
   -DPIPY_GUI=%{?with_gui:ON}%{!?with_gui:OFF} \
   -DPIPY_SAMPLES=%{?with_gui:ON}%{!?with_gui:OFF} \
   -DPIPY_STATIC=${PIPY_STATIC} \
+  -DPIPY_BPF=${PIPY_BPF} \
   -DCMAKE_BUILD_TYPE=${BUILD_TYPE} ..
 make -j$(getconf _NPROCESSORS_ONLN)