- uses '-g -DFULLDEBUG' (like Debug), but with -O3 (like Opt).
This adds in debug symbols and FULLDEBUG code segments (good for
code development) but retains -O3 optimizations and code paths and
avoids the much slower -O0 associated with 'Debug'.
- add in central wmake/General/common/{c,c++}XXX tuning,
which helps reduce the number of nearly identical files
ENH: add support for wmake -debug-Og
- for compilers such as gcc and clang, may have several different
variants installed on the computer. Use WM_COMPILER_CONTROL to
specify the preferred variant.
Eg,
WM_COMPILER=Gcc
WM_COMPILER_CONTROL="version=8"
will compile with "gcc-8" and "g++-8"
Good practice would be to tag output directory names with the
version too. Eg
WM_COMPILER=Clang110
WM_COMPILER_CONTROL="version=11.0"
STYLE: modify message for change of gcc -> clang (darwin)
- introduce WM_COMPILE_CONTROL variable to convey control information
into the build rules.
The convention (as per spack):
- '+' to select a feature
- '~' to deselect a feature
Eg, to select the gold linker, and disable openmp
(spaces are not required):
WM_COMPILE_CONTROL="+gold ~openmp"
CONFIG: accept FOAM_EXTRA_LDFLAGS for AMD, gold, Mingw linkers
CONFIG: generalize PROJECT_LIBS (-ldl used almost universally)
- with 1906, OpenFOAM is purely C++ code and the last toolchain bits C
code have been avoided. Thus relax the wmake C rule for including
WM_COMPILE_OPTION. This makes it much easier to add different
compiler options with fewer files.
For example, for Broadwell-specific options:
cd wmake/rules/linux64Gcc
cp c++Opt c++OptBdw
edit this file and then use WM_COMPILE_OPTION=OptBdw
- ensure that WM_COMPILE_OPTION is always non-empty
- instead of
WM_COMPILER=GccKNL WM_COMPILE_OPTION=Opt
-> linux64GccKNLDPInt32Opt
now specify
WM_COMPILER=Gcc WM_COMPILE_OPTION=OptKNL
-> linux64GccDPInt32OptKNL
This makes it easier (and more obvious) for adding different tweaks
without needing to generate too many files.
Eg,
cd wmake/rules/linux64Gcc
cp cOpt cOptBdw
cp c++Opt c++OptBdw
edit these two files and then use WM_COMPILE_OPTION=OptBdw
CONFIG: provide some default c/c++ flags in General compiler rules
- can make is easier when deriving new compile options, and ensures
that '-02' is enabled as an initial default.
- required if there is no system openmp and libomp or libgomp are
only found in the clang hierarchy
STYLE: add some notes in the openmp rules.
- the _OPENMP macro is now used in low-level testing files
