Compilation fails if using CImg in the same project.
Closed this issue · 5 comments
anates014 commented
Error:
~/fftw++-2.02/Complex.h:31:7: error: expected identifier before numeric constant
class Complex
^
~/fftw++-2.02/Complex.h:31:7: error: expected unqualified-id before numeric constant
Used compiler: g++-4.8.5 and g++-5.3.0
johncbowman commented
It sounds like a namespace pollution issue. Can you please post an example?
I downloaded CImg-1.7.1_pre033116 but
grep -r Complex CImg-1.7.1_pre033116
does not indicate anything helpful.
anates014 commented
Sample code:
#include "CImg.h"
#include "fftw++.h"
// Compile with:
// g++ -I .. -fopenmp example0.cc ../fftw++.cc -lfftw3 -lfftw3_omp
using namespace std;
using namespace utils;
using namespace fftwpp;
int main()
{
fftw::maxthreads=get_max_threads();
cout << "1D complex to complex in-place FFT, not using the Array class"
<< endl;
unsigned int n=4;
Complex *f=ComplexAlign(n);
fft1d Forward(n,-1);
fft1d Backward(n,1);
for(unsigned int i=0; i < n; i++) f[i]=i;
cout << "\ninput:" << endl;
for(unsigned int i=0; i < n; i++) cout << f[i] << endl;
Forward.fft(f);
cout << "\noutput:" << endl;
for(unsigned int i=0; i < n; i++) cout << f[i] << endl;
Backward.fftNormalized(f);
cout << "\ntransformed back:" << endl;
for(unsigned int i=0; i < n; i++) cout << f[i] << endl;
deleteAlign(f);
}
If `#include "CImg.h"` is placed before `#include "fftw++.h"`, it results in
In file included from /usr/include/X11/Xlib.h:44:0,
from CImg.h:270,
from test.cpp:1:
fftw++-2.02/fftw++.h:77:30: error: expected unqualified-id before numeric constant
typedef std::complex<double> Complex;
^
fftw++-2.02/align.h:97:8: error: expected unqualified-id before numeric constant
inline Complex *ComplexAlign(size_t size)
^
fftw++-2.02/fftw++.h:93:39: error: expected identifier before numeric constant
extern "C" fftw_plan Planner(fftw *F, Complex *in, Complex *out);
^
fftw++-2.02/fftw++.h:93:39: error: expected ‘,’ or ‘...’ before numeric constant
fftw++-2.02/fftw++.h:147:41: error: expected identifier before numeric constant
unsigned int realsize(unsigned int n, Complex *in, Complex *out=NULL) {
^
fftw++-2.02/fftw++.h:147:41: error: expected ‘,’ or ‘...’ before numeric constant
fftw++-2.02/fftw++.h:151:41: error: expected identifier before numeric constant
unsigned int realsize(unsigned int n, Complex *in, double *out) {
^
fftw++-2.02/fftw++.h:151:41: error: expected ‘,’ or ‘...’ before numeric constant
In file included from test.cpp:2:0:
fftw++-2.02/fftw++.h:151:16: error: ‘unsigned int fftwpp::fftw::realsize(unsigned int, int)’ cannot be overloaded
unsigned int realsize(unsigned int n, Complex *in, double *out) {
^
fftw++-2.02/fftw++.h:147:16: error: with ‘unsigned int fftwpp::fftw::realsize(unsigned int, int)’
unsigned int realsize(unsigned int n, Complex *in, Complex *out=NULL) {
^
In file included from /usr/include/X11/Xlib.h:44:0,
from CImg.h:270,
from test.cpp:1:
fftw++-2.02/fftw++.h:155:53: error: expected identifier before numeric constant
unsigned int realsize(unsigned int n, double *in, Complex *out) {
^
fftw++-2.02/fftw++.h:155:53: error: expected ‘,’ or ‘...’ before numeric constant
fftw++-2.02/fftw++.h:166:40: error: expected identifier before numeric constant
static fftw_plan (*planner)(fftw *f, Complex *in, Complex *out);
^
fftw++-2.02/fftw++.h:166:40: error: expected ‘,’ or ‘...’ before numeric constant
fftw++-2.02/fftw++.h:173:21: error: expected identifier before numeric constant
static void Shift(Complex *data, unsigned int nx, unsigned int ny,
^
fftw++-2.02/fftw++.h:173:21: error: expected ‘,’ or ‘...’ before numeric constant
fftw++-2.02/fftw++.h:212:21: error: expected identifier before numeric constant
static void Shift(Complex *data, unsigned int nx, unsigned int ny,
^
fftw++-2.02/fftw++.h:212:21: error: expected ‘,’ or ‘...’ before numeric constant
In file included from test.cpp:2:0:
fftw++-2.02/fftw++.h:212:15: error: ‘static void fftwpp::fftw::Shift(int)’ cannot be overloaded
static void Shift(Complex *data, unsigned int nx, unsigned int ny,
^
fftw++-2.02/fftw++.h:173:15: error: with ‘static void fftwpp::fftw::Shift(int)’
static void Shift(Complex *data, unsigned int nx, unsigned int ny,
^
In file included from /usr/include/X11/Xlib.h:44:0,
from CImg.h:270,
from test.cpp:1:
fftw++-2.02/fftw++.h:276:26: error: expected identifier before numeric constant
virtual fftw_plan Plan(Complex *in, Complex *out) {return NULL;};
^
fftw++-2.02/fftw++.h:276:26: error: expected ‘,’ or ‘...’ before numeric constant
fftw++-2.02/fftw++.h:278:26: error: expected identifier before numeric constant
inline void CheckAlign(Complex *p, const char *s) {
^
fftw++-2.02/fftw++.h:278:26: error: expected ‘,’ or ‘...’ before numeric constant
fftw++-2.02/fftw++.h:296:53: error: expected identifier before numeric constant
threaddata time(fftw_plan plan1, fftw_plan planT, Complex *in, Complex *out,
^
fftw++-2.02/fftw++.h:296:53: error: expected ‘,’ or ‘...’ before numeric constant
fftw++-2.02/fftw++.h:346:10: error: expected unqualified-id before numeric constant
inline Complex *CheckAlign(Complex *in, Complex *out, bool constructor=true)
^
fftw++-2.02/fftw++.h:358:20: error: expected identifier before numeric constant
threaddata Setup(Complex *in, Complex *out=NULL) {
^
fftw++-2.02/fftw++.h:358:20: error: expected ‘,’ or ‘...’ before numeric constant
fftw++-2.02/fftw++.h:390:20: error: expected identifier before numeric constant
threaddata Setup(Complex *in, double *out) {
^
fftw++-2.02/fftw++.h:390:20: error: expected ‘,’ or ‘...’ before numeric constant
In file included from test.cpp:2:0:
fftw++-2.02/fftw++.h:390:14: error: ‘fftwpp::threaddata fftwpp::fftw::Setup(int)’ cannot be overloaded
threaddata Setup(Complex *in, double *out) {
^
fftw++-2.02/fftw++.h:358:14: error: with ‘fftwpp::threaddata fftwpp::fftw::Setup(int)’
threaddata Setup(Complex *in, Complex *out=NULL) {
^
In file included from /usr/include/X11/Xlib.h:44:0,
from CImg.h:270,
from test.cpp:1:
fftw++-2.02/fftw++.h:394:32: error: expected identifier before numeric constant
threaddata Setup(double *in, Complex *out=NULL) {
^
fftw++-2.02/fftw++.h:394:32: error: expected ‘,’ or ‘...’ before numeric constant
fftw++-2.02/fftw++.h:398:24: error: expected identifier before numeric constant
virtual void Execute(Complex *in, Complex *out, bool=false) {
^
fftw++-2.02/fftw++.h:398:24: error: expected ‘,’ or ‘...’ before numeric constant
fftw++-2.02/fftw++.h:402:3: error: expected unqualified-id before numeric constant
Complex *Setout(Complex *in, Complex *out) {
^
In file included from test.cpp:2:0:
fftw++-2.02/fftw++.h:440:46: error: expected ‘}’ before end of line
fftw++-2.02/fftw++.h: In member function ‘unsigned int fftwpp::fftw::realsize(unsigned int, int)’:
fftw++-2.02/fftw++.h:148:14: error: ‘out’ was not declared in this scope
return (!out || in == out) ? 2*(n/2+1) : n;
^
fftw++-2.02/fftw++.h:148:21: error: ‘in’ was not declared in this scope
return (!out || in == out) ? 2*(n/2+1) : n;
^
fftw++-2.02/fftw++.h: In member function ‘unsigned int fftwpp::fftw::realsize(unsigned int, int)’:
fftw++-2.02/fftw++.h:152:23: error: ‘in’ was not declared in this scope
return realsize(n,in,(Complex *) out);
^
fftw++-2.02/fftw++.h:152:36: error: expected primary-expression before ‘)’ token
return realsize(n,in,(Complex *) out);
^
fftw++-2.02/fftw++.h: In member function ‘unsigned int fftwpp::fftw::realsize(unsigned int, double*, int)’:
fftw++-2.02/fftw++.h:156:33: error: expected primary-expression before ‘)’ token
return realsize(n,(Complex *) in,out);
^
fftw++-2.02/fftw++.h:156:38: error: ‘out’ was not declared in this scope
return realsize(n,(Complex *) in,out);
^
fftw++-2.02/fftw++.h: In static member function ‘static void fftwpp::fftw::Shift(int)’:
fftw++-2.02/fftw++.h:175:22: error: ‘ny’ was not declared in this scope
unsigned int nyp=ny/2+1;
^
fftw++-2.02/fftw++.h:176:23: error: ‘nx’ was not declared in this scope
unsigned int stop=nx*nyp;
^
fftw++-2.02/fftw++.h:180:38: error: invalid use of member ‘fftwpp::fftw::threads’ in static member function
#pragma omp parallel for num_threads(threads)
^
fftw++-2.02/fftw++.h:137:16: note: declared here
unsigned int threads;
^
fftw++-2.02/fftw++.h:183:18: error: ‘p’ was not declared in this scope
Complex *p=data+i;
^
fftw++-2.02/fftw++.h:183:20: error: ‘data’ was not declared in this scope
Complex *p=data+i;
^
fftw++-2.02/fftw++.h: In static member function ‘static void fftwpp::fftw::Shift(int)’:
fftw++-2.02/fftw++.h:214:22: error: ‘nz’ was not declared in this scope
unsigned int nzp=nz/2+1;
^
fftw++-2.02/fftw++.h:215:23: error: ‘ny’ was not declared in this scope
unsigned int nyzp=ny*nzp;
^
fftw++-2.02/fftw++.h:216:8: error: ‘nx’ was not declared in this scope
if(nx % 2 == 0 && ny % 2 == 0) {
^
fftw++-2.02/fftw++.h:218:16: error: ‘pstop’ was not declared in this scope
Complex *pstop=data;
^
fftw++-2.02/fftw++.h:218:22: error: ‘data’ was not declared in this scope
Complex *pstop=data;
^
fftw++-2.02/fftw++.h:219:16: error: ‘p’ was not declared in this scope
Complex *p=data;
^
fftw++-2.02/fftw++.h:221:38: error: invalid use of member ‘fftwpp::fftw::threads’ in static member function
#pragma omp parallel for num_threads(threads)
^
fftw++-2.02/fftw++.h:137:16: note: declared here
unsigned int threads;
^
fftw++-2.02/fftw++.h:223:7: error: invalid controlling predicate
for(unsigned i=0; i < nx; i++) {
^
fftw++-2.02/fftw++.h: In member function ‘void fftwpp::fftw::CheckAlign(int)’:
fftw++-2.02/fftw++.h:279:17: error: ‘p’ was not declared in this scope
if((size_t) p % sizeof(Complex) == 0) return;
^
fftw++-2.02/fftw++.h:280:33: error: ‘s’ was not declared in this scope
std::cerr << "WARNING: " << s << " array is not " << sizeof(Complex)
^
fftw++-2.02/fftw++.h:281:47: error: ‘p’ was not declared in this scope
<< "-byte aligned: address " << p << std::endl;
^
fftw++-2.02/fftw++.h: In member function ‘fftwpp::threaddata fftwpp::fftw::time(fftw_plan, fftw_plan, int)’:
fftw++-2.02/fftw++.h:302:9: error: ‘in’ was not declared in this scope
fft(in,out);
^
fftw++-2.02/fftw++.h:302:12: error: ‘out’ was not declared in this scope
fft(in,out);
^
fftw++-2.02/fftw++.h:302:15: error: ‘fft’ was not declared in this scope
fft(in,out);
^
fftw++-2.02/fftw++.h:303:12: error: cannot convert ‘fftwpp::fftw::Threads’ from type ‘unsigned int (fftwpp::fftw::)()’ to type ‘unsigned int’
threads=Threads;
^
fftw++-2.02/fftw++.h:314:14: error: cannot convert ‘fftwpp::fftw::Threads’ from type ‘unsigned int (fftwpp::fftw::)()’ to type ‘unsigned int’
threads=Threads;
^
fftw++-2.02/fftw++.h:332:18: error: cannot convert ‘fftwpp::fftw::Threads’ from type ‘unsigned int (fftwpp::fftw::)()’ to type ‘unsigned int’
threads=Threads;
^
fftw++-2.02/fftw++.h: In member function ‘fftwpp::threaddata fftwpp::fftw::Setup(int)’:
fftw++-2.02/fftw++.h:359:17: error: ‘in’ was not declared in this scope
bool alloc=!in;
^
fftw++-2.02/fftw++.h:360:18: error: ‘ComplexAlign’ is not a member of ‘utils’
if(alloc) in=utils::ComplexAlign((doubles+1)/2);
^
fftw++-2.02/fftw++.h:361:5: error: ‘out’ was not declared in this scope
out=CheckAlign(in,out);
^
fftw++-2.02/fftw++.h: In member function ‘fftwpp::threaddata fftwpp::fftw::Setup(int)’:
fftw++-2.02/fftw++.h:391:18: error: ‘in’ was not declared in this scope
return Setup(in,(Complex *) out);
^
fftw++-2.02/fftw++.h:391:31: error: expected primary-expression before ‘)’ token
return Setup(in,(Complex *) out);
^
fftw++-2.02/fftw++.h: In member function ‘fftwpp::threaddata fftwpp::fftw::Setup(double*, int)’:
fftw++-2.02/fftw++.h:395:28: error: expected primary-expression before ‘)’ token
return Setup((Complex *) in,out);
^
fftw++-2.02/fftw++.h:395:33: error: ‘out’ was not declared in this scope
return Setup((Complex *) in,out);
^
fftw++-2.02/fftw++.h: In member function ‘virtual void fftwpp::fftw::Execute(int)’:
fftw++-2.02/fftw++.h:399:44: error: ‘in’ was not declared in this scope
fftw_execute_dft(plan,(fftw_complex *) in,(fftw_complex *) out);
^
fftw++-2.02/fftw++.h:399:64: error: ‘out’ was not declared in this scope
fftw_execute_dft(plan,(fftw_complex *) in,(fftw_complex *) out);
^
fftw++-2.02/fftw++.h: At global scope:
fftw++-2.02/fftw++.h:440:46: error: expected unqualified-id before end of line
fftw++-2.02/fftw++.h:440:46: error: expected ‘}’ before end of line
fftw++-2.02/fftw++.h:440:46: error: expected declaration before end of line
If placed afterwards, it results in
test.cpp: In function ‘int main()’:
test.cpp:18:12: error: ‘f’ was not declared in this scope
Complex *f=ComplexAlign(n);
^
If completely removed, I get a working compilation. Tested both with g++-4.8.5 and g++-5.3.0
johncbowman commented
Try inserting
#include "Complex.h"
before
#include "fftw++.h"
anates014 commented
If #include "CImg.h" is after the other two:
test.cpp: In function ‘int main()’:
test.cpp:19:12: error: ‘f’ was not declared in this scope
Complex *f=ComplexAlign(n);
^
If before:
In file included from /usr/include/X11/Xlib.h:44:0,
from CImg.h:270,
from test.cpp:1:
fftw++-2.02/Complex.h:31:7: error: expected identifier before numeric constant
class Complex
^
fftw++-2.02/Complex.h:31:7: error: expected unqualified-id before numeric constant
In file included from test.cpp:3:0:
fftw++-2.02/fftw++.h:180:46: error: expected declaration before end of line
johncbowman commented
Probably this file is getting included by Cimg.h and the author forgot to #undef Complex at the end.
/usr/include/X11/X.h:#define Complex 0 /* paths may intersect */
The solution is to manually undefine the unwanted preprocessor symbol:
#include "fftw++.h"
#include "CImg.h"
#undef Complex