Problem about Build Instructions

[Richard-happy]

I followed README.md to install libmesh. When I stepped in the stage of 6. make, there is an error which shows that

Making all in .
make[1]: Entering directory '/home/LJL/libmesh/build'
CXX src/apps/fparser_parse_dbg-fparser_parse.o
In file included from ./include/libmesh/function_base.h:24,
from ./include/libmesh/parsed_function.h:22,
from ../src/apps/fparser_parse.C:23:
./include/libmesh/libmesh_common.h:27:4: error: #error DEBUG and NDEBUG should never be defined simultaneously
27 | # error DEBUG and NDEBUG should never be defined simultaneously
| ^~~~~
make[1]: *** [Makefile:32526: src/apps/fparser_parse_dbg-fparser_parse.o] Error 1
make[1]: Leaving directory '/home/LJL/libmesh/build'
make: *** [Makefile:33169: all-recursive] Error 1

Could you please help me to complete installing?

[jwpeterson]

I believe what you are seeing is related to a new check that we put in place to ensure that users' environmental CXXFLAGS are not in conflict with the build METHOD they are using. In this case it looks like you are making a dbg build, but there is a -DNDEBUG coming from your environment (either CXXFLAGS as mentioned or some other type of "flags").