的Qt 4.6.1:=对比=错误:未定义参照QMAIN(INT,焦炭**)
在下面的pro文件,当我使用语句
sources = ef.cpp
我得到如下错误:
RInside.h: No such file or directory
然后当我更换=:=,如:
sources := ef.cpp
上述错误消失了,我得到一个新的错误:
error: undefined reference to qMain(int, char**)
从这里:https://stackoverflow.com/a/448939/462608
VARIABLE = value Normal setting of a variable - values within it are recursively expanded when the variable is used, not when it's declared
VARIABLE := value Setting of a variable with simple expansion of the values inside - values within it are expanded at declaration time.
我想了解这里发生了什么,而w帽子是解决方案。
的.cpp
#include <RInside.h>
int main(int argc, char *argv[])
{
RInside R(argc, argv);
R["txt"] = "Hello, world!\n";
R.parseEvalQ ("cat(txt)");
exit(0);
}
的.pro
TEMPLATE = app
TARGET =
DEPENDPATH += .
INCLUDEPATH += .
R_HOME := 'c:/R-2.15.1'
# Input
sources = ef.cpp
programs := $(sources:.cpp=)
## include headers and libraries for R
RCPPFLAGS := $(shell $(R_HOME)/bin/R $(R_ARCH) CMD config --cppflags)
RLDFLAGS := $(shell $(R_HOME)/bin/R $(R_ARCH) CMD config --ldflags)
RBLAS := $(shell $(R_HOME)/bin/R $(R_ARCH) CMD config BLAS_LIBS)
RLAPACK := $(shell $(R_HOME)/bin/R $(R_ARCH) CMD config LAPACK_LIBS)
## include headers and libraries for Rcpp interface classes
RCPPINCL := $(shell echo 'Rcpp:::CxxFlags()' | $(R_HOME)/bin/R $(R_ARCH) --vanilla
--slave)
RCPPLIBS := $(shell echo 'Rcpp:::LdFlags()' | $(R_HOME)/bin/R $(R_ARCH) --vanilla --slave)
## include headers and libraries for RInside embedding classes
RINSIDEINCL := $(shell echo 'RInside:::CxxFlags()' | $(R_HOME)/bin/R $(R_ARCH) --vanilla --slave)
RINSIDELIBS := $(shell echo 'RInside:::LdFlags()' | $(R_HOME)/bin/R $(R_ARCH) --vanilla --slave)
## compiler etc settings used in default make rules
CXX := $(shell $(R_HOME)/bin/R $(R_ARCH) CMD config CXX)
CPPFLAGS := -Wall $(shell $(R_HOME)/bin/R $(R_ARCH) CMD config CPPFLAGS)
#CXXFLAGS := $(RCPPFLAGS) $(RCPPINCL) $(RINSIDEINCL) $(shell $(R_HOME)/bin/R $(R_ARCH)
CMD config CXXFLAGS)
QMAKE_CXXFLAGS := $(RCPPFLAGS) $(RCPPINCL) $(RINSIDEINCL) $(shell $(R_HOME)/bin/R $(R_ARCH) CMD config CXXFLAGS)
LDFLAGS = -s
QMAKE_LIBS := $(RLDFLAGS) $(RBLAS) $(RLAPACK) $(RINSIDELIBS) $(RCPPLIBS)
CC := $(shell $(R_HOME)/bin/R $(R_ARCH) CMD config CXX)
看起来你已经做出的改变让你进入链接阶段。你有'qMain(int,char **)'吗?它是否真的被编译? – cHao
@cHao我已经发布了我拥有的唯一源代码。我没有专门写qMain在任何地方。如果你的意思是别的,请澄清。 –
我在看到提示,链接器找不到主要功能。这意味着它根本不存在,名称错误,或者不在正在编译的任何文件中。您的主要功能在哪里以及如何定义? ñ如果你没有一个,这个东西应该如何工作? – cHao