1. A sample makefile and how it works. Let's start by looking at a sample makefile: ##### # # Sample Makefile for C++ applications # Works for single and multiple file programs. # written by Robert Duvall # modified by Owen Astrachan # and by Garrett Mitchener # ##### ##### # Application-specific variables # EXEC is the name of the executable file # SRC_FILES is a list of all source code files
CFLAGS, CPPFLAGS, CXXFLAGS, FFLAGS and LDFLAGS may be defined with All the cgo CPPFLAGS and CFLAGS directives in a package are concatenated and used to compile C files in that package. -V Print cgo version and exit.
CFLAGS enables the addition of switches for the C compiler, while CXXFLAGS is meant to be used when invoking a C++ compiler. Similarly, a variable CPPFLAGS exists with switches to be passed to the C or C++ preprocessor. Similarly, FFLAGS enables the addition of switches for a Fortran compiler. Currently, quite a few Arduino makefiles use CPPFLAGS (and other custom macros beginning with CPP) as the C++ counterpart for CFLAGS. However, "CPP" in this context means "C preprocessor", not "C plus plus". The right name for C++ flags is CXXFLAGS (think of the X as a turned +).
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The reason ‘$(CPPFLAGS)’ appears after ‘$(AM_CPPFLAGS)’ or ‘$(mumble_CPPFLAGS)’ in the compile command is that users should always have the last say.It probably makes more sense if you think about it while looking at the ‘CXXFLAGS=-O0’ above, which should supersede any other switch from AM_CXXFLAGS or mumble_CXXFLAGS (and this of course replaces the previous value of CXXFLAGS). CFLAGS vs CPPFLAGS. 103 . Ich verstehe, dass CFLAGS (oder CXXFLAGS für C ++) für den Compiler sind, während CPPFLAGS vom Präprozessor verwendet wird. cflags vs cppflags Entiendo que CFLAGS (o CXXFLAGS para C ++) son para el compilador, mientras que CPPFLAGS es utilizado por el preprocesador. Pero todavía no entiendo la diferencia.
PARTICULAR PURPOSE. configure:4353: $? = 0 configure:4342: gcc -v >&5 Using CPPFLAGS='' CXX='g++ -std=gnu++98' CXXFLAGS='-Og -save-temps'
103 . Ich verstehe, dass CFLAGS (oder CXXFLAGS für C ++) für den Compiler sind, während CPPFLAGS vom Präprozessor verwendet wird.
Preserve user-passed CXXFLAGS/CFLAGS 2. Compile with -DDEBUG_LOCKORDER 3. Add -DDEBUG -DDEBUG_LOCKORDER to CPPFLAGS (since they
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This way, the environment keeps following GNU autoconf standards, and CMake still gets all the tweaks set in `makepkg.conf` (which usually includes `-D_FORTIFY_SOURCE=2` in `CPPFLAGS`, `-fno-plt` in `C*FLAGS` and more secure `LDFLAGS`). If AM_CPPFLAGS is used, then any Bob> per-target CPPFLAGS option completely overrides it. Thanks for pointing this out. I'm checking this in. 2003-11-25 Alexandre Duret-Lutz
will be added to MODULE_big link line. PG_CONFIG
Environment variables CPPFLAGS, CXXFLAGS, CFLAGS, LDFLAGS, LIBS generated by the build helper to use them in the configure, make and install steps.
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따라서 -i (헤더파일 경로)나 -d (전처리 매크로) 등을 지정하도록 사용하면 됩니다. 종종 -i 나 -d 를 cflags 나 cxxflags 에서 사용하는 경우가 있는데, 전처기 과정에서 필요한 내용은 cppflags 에서 사용하는 것이 좋습니다.
編譯 .c 檔案的
--with-wrapper-cxxflags: Extra flags to add to CXXFLAGS when using mpiCC . -- with-wrapper-fflags: Extra flags to add to FFLAGS when using mpif77 (this option
2018年4月1日 CPPFLAGS 被认为是对标志为C ^ P重新P rocessor; CXXFLAGS 是用于C ++编译 器的标志。 make中的默认规则（在我的机器上，无论如何）
CPPFLAGS is given)]) AC_ARG_VAR(, [additional CXXFLAGS (ignored [ command -v cygpath > /dev/null && MJIT_CC=`cygpath -ma $MJIT_CC`]) shift 2
#!/usr/bin/make -f; # -*- mode:makefile -*-; ##### Author: Travis Cross
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colorout.hpp $(IMPLS:.cpp=.hpp) CPPFLAGS=-std=c++11 -Wall -Wextra generation %.tab.cpp %.tab.hpp: %.ypp bison -d $< %.output: %.ypp bison -v $< .
Jag har sett C ++ - kod sparad som både .cc- och .cpp-filer.
2018-11-20
The default rules in make (on my colorout.hpp $(IMPLS:.cpp=.hpp) CPPFLAGS=-std=c++11 -Wall -Wextra generation %.tab.cpp %.tab.hpp: %.ypp bison -d $< %.output: %.ypp bison -v $< . CXXFLAGS 表示用于C++ 编译器的选项。 CPPFLAGS 可以用于C 和C++ 两者。 Suppress the automatic version number appended to the DLL file name on Windows. suppress_vcproj_warnings, Suppress warnings of the VS project generator.
+Summary: [build] CXXFLAGS vs. CPPFLAGS + +I think a bug is the easiest way to do this. + +My build in HEAD/CVS doesn't work for the c++ plugins. Reason is Brian +Cameron's recent changes that move libbla_la_CXXFLAGS to +libbla_la_CPPFLAGS, which causes the build to fail on my system.