Qt 4.6.1
在下面的.pro文件中,当我使用该语句时
sources = ef.cpp
我收到以下错误:
RInside.h: No such file or directory
然后当我用 := 替换 = 时:
sources := ef.cpp
上述错误消失,并且我收到一个新错误:
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以及解决方案是什么。
.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);
}
.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)
最佳答案
这看起来不像 Qt 项目,因此您可能应该禁用针对 Qt 库的链接。将QT
和CONFIG
设置为空:
QT =
CONFIG =
如果另一方面,这是一个应该链接到 Qt 库的 Qt 项目,那么问题就在于您正在覆盖重要变量,例如 QMAKE_LIBS
和 QMAKE_CXXFLAGS
。使用+=
,而不是:=
。另外,请使用LIBS
,而不是QMAKE_LIBS
。
关于c++ - := versus = error: undefined reference to qMain(int, 字符**),我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/13171263/