Hi,

I am trying to compile a C++ code (not mine) initially compiled on OSX, and I am trying to get it compiled on Ubuntu (11.04). I have absolutely no experience in C++, nor am I required to learn C++ (I usually do all my coding in Python)

The person I got the code from used a "Build script" to compile the code, opf which I need to convert to a linux compatible form. I've inserted the original build script below:

rm -f *.o
g++-mp-4.4 -c -O -m64 -Dintel_osx -I/usr/local/difmap2.4k/include splitc.cc
g++-mp-4.4 -o splitc splitc.o -L/usr/local/difmap2.4k/lib -lsphere -L/usr/local/difmap2.4k/lib -llogio -L/usr/local/difmap2.4k/lib -lpager -L/usr/local/difmap2.4k/lib -lcpgplot -L/opt/local/lib -lpng -lpgplot -L/usr/X11/lib -lX11 -L/usr/local/difmap2.4k/lib -lfits -L/usr/local/difmap2.4k/lib -lrecio -L/usr/local/difmap2.4k/lib -lscrfil -L/usr/local/difmap2.4k/lib -lslalib -ltecla -lcurses /opt/local/lib/gcc44/gcc/x86_64-apple-darwin11/4.4.6/libgcc.a      /System/Library/Frameworks/Foundation.framework/Versions/Current/Foundation      /System/Library/Frameworks/AppKit.framework/Versions/Current/AppKit -lm

Now here's my version for Ubuntu:

rm -f *.o
g++-4.5 -c -O -I/usr/local/uvf_difmap/include splitc.cc
g++-4.5 -o splitc splitc.o -L/usr/local/uvf_difmap/lib/libsphere -L/usr/local/uvf_difmap/lib/liblogio -L/usr/local/uvf_difmap/lib/libpager -L/usr/local/uvf_difmap/lib/libcpgplot -L/usr/lib/x86_64-linux-gnu/libpng -L/usr/lib/libpgplot -L/usr/lib/x86_64-linux-gnu/libX11 -L/usr/local/uvf_difmap/lib/libfits -L/usr/local/uvf_difmap/lib/librecio -L/usr/local/uvf_difmap/lib/libscrfil -L/usr/local/uvf_difmap/lib/libslalib -L/usr/local/uvf_difmap/libtecla -L/usr/lib/libcurses /usr/lib/x86_64-linux-gnu/gcc/x86_64-linux-gnu/4.5/libgcc.a

Question: How do I run this "build script"? Searching on google gives me no help/information.

Since I did not know how to run the build script I decided to enter each line separately into the terminal, which did not work, but gave me the following errors:

hayden@roo:/usr/local/uvf_difmap/split_src$ sudo g++-4.5 -c -O -I/usr/local/uvf_difmap/include splitc.cc
splitc.cc: In member function ‘bool fitsfile::open()’:
splitc.cc:288:48: warning: deprecated conversion from string constant to ‘char*’
splitc.cc: In member function ‘bool fitsfile::copyHistory(fitsfile&)’:
splitc.cc:523:81: warning: deprecated conversion from string constant to ‘char*’
splitc.cc:525:68: warning: deprecated conversion from string constant to ‘char*’

And the second line:

hayden@roo:/usr/local/uvf_difmap/split_src$ sudo g++-4.5 -o splitc splitc.o -L/usr/local/uvf_difmap/lib/libsphere -L/usr/local/uvf_difmap/lib/liblogio -L/usr/local/uvf_difmap/lib/libpager -L/usr/local/uvf_difmap/lib/libcpgplot -L/usr/lib/x86_64-linux-gnu/libpng -L/usr/lib/libpgplot -L/usr/lib/x86_64-linux-gnu/libX11 -L/usr/local/uvf_difmap/lib/libfits -L/usr/local/uvf_difmap/lib/librecio -L/usr/local/uvf_difmap/lib/libscrfil -L/usr/local/uvf_difmap/lib/libslalib -L/usr/local/uvf_difmap/lib/libtecla -L/usr/lib/libcurses /usr/lib/x86_64-linux-gnu/gcc/x86_64-linux-gnu/4.5/libgcc.a
splitc.o: In function `fitsfile::~fitsfile()':
splitc.cc:(.text+0x651): undefined reference to `del_Fits(Fits*)'
splitc.o: In function `fitsfile::init()':
splitc.cc:(.text+0x7f0): undefined reference to `find_gpar(PHdu*, char const*, int, int)'
splitc.cc:(.text+0x872): undefined reference to `find_axis(PHdu*, char const*, int, int)'
splitc.o: In function `fitsfile::closeData()':
splitc.cc:(.text+0x9d8): undefined reference to `end_data(Fits*, Hdu*)'
splitc.o: In function `fitsfile::close()':
splitc.cc:(.text+0xa14): undefined reference to `del_Fits(Fits*)'
splitc.o: In function `fitsfile::addAntennae(fitsfile&, int)':
splitc.cc:(.text+0xae8): undefined reference to `dup_Hdu(Fits*, Hdu*, Fits*)'
splitc.o: In function `fitsfile::split(fitsfile&, double)':
splitc.cc:(.text+0xe7e): undefined reference to `rgroup(Fits*, PHdu*, long, long, long, Fittype, int, char*, void*)'
splitc.cc:(.text+0xf0e): undefined reference to `rimage(Fits*, PHdu*, long, long, long, Fittype, int, char*, void*)'
splitc.cc:(.text+0xfbf): undefined reference to `get_axis(PHdu*, int)'
splitc.cc:(.text+0x11c9): undefined reference to `wgroup(Fits*, PHdu*, long, long, long, Fittype, int, char*, void*)'
splitc.cc:(.text+0x125a): undefined reference to `wimage(Fits*, PHdu*, long, long, long, Fittype, int, char*, void*)'
splitc.o: In function `fitsfile::freq()':
splitc.cc:(.text+0x136f): undefined reference to `get_axis(PHdu*, int)'
splitc.o: In function `fitsfile::open()':
splitc.cc:(.text+0x13d8): undefined reference to `del_Fits(Fits*)'
splitc.cc:(.text+0x13fe): undefined reference to `new_Fits(char const*, int, int, int, int)'
splitc.cc:(.text+0x14b2): undefined reference to `find_table(Fits*, char*, int, Hdu*)'
splitc.o: In function `fitsfile::copyHistory(fitsfile&)':
splitc.cc:(.text+0x150d): undefined reference to `new_hline(Hdu*, int)'
splitc.cc:(.text+0x1534): undefined reference to `wcomkey(Fits*, Hdu*, char*, int, char*, char*)'
splitc.cc:(.text+0x155b): undefined reference to `get_key(Fits*, Hdu*, char*, Fittype, Seektype, Fitkey*)'
splitc.o: In function `fitsfile::create(fitsfile&, int)':
splitc.cc:(.text+0x15b2): undefined reference to `del_Fits(Fits*)'
splitc.cc:(.text+0x15d8): undefined reference to `new_Fits(char const*, int, int, int, int)'
splitc.cc:(.text+0x15f6): undefined reference to `copy_Hdu(Hdu*)'
splitc.cc:(.text+0x1669): undefined reference to `add_Hdu(Fits*, Hdu*)'
splitc.cc:(.text+0x16c2): undefined reference to `end_header(Fits*, Hdu*)'
collect2: ld returned 1 exit status

Sorry for the long post, but I've exhausted all other options.

cheers,
H

Here's the code split.cc if anyone's interested.

#include <libfits.h>
#include <stdio.h>
#include <stdlib.h>
//#include <values.h>
#include <vector>
#include <string>
#include <string.h>

#include <iostream>

using namespace std;

void showProgress(int size, float fraction)
{
	cout << "|";
	fraction += 0.005;
	int filled = (int)((float)size * fraction);
	int unfilled = size - filled;
	for(int i = 0; i < filled; i++)
		cout << "#";
	for(int i = 0; i < unfilled; i++)
		cout << "-";
	cout << "|   ";
	cout << (int)(fraction * 100.0) << "%";

	for(int i = 0; i < size + 2 + 3 + ((fraction > 0.995) ? 4 : 3); i++)
		cout << "\b";
	cout.flush();
}

void finalizeProgress(int size)
{
	cout << "Done!";
	for(int i = 0; i < size + 4; i++)
		cout << " ";
	cout << "\n";
}

class fitsfile
{
	enum
	{
		eUU = 0,
		eVV,
		eWW,
		eBaseline,
		eDate
	} EGroup;

	enum
	{
		eComplex = 0,
		eStokes,
		eFreq,
		eRA,
		eDec
	} EAxis;

	typedef struct
	{
		string name;
		int index;
	} SGroup;

	typedef struct
	{
		string name;
		int index;
		int expectedSize;
		int size;
	} SAxis;

public:
	fitsfile(string filename);
	~fitsfile();
	
	bool create(fitsfile &ref, int nGroups);
	bool open();
	bool isCompatibleWith(fitsfile &ref);
	bool split(fitsfile &fitsin, double refFreq);
	int addAntennae(fitsfile &fitsin, int startSubChan);
	bool closeData();
	void close();
	
	const char * name();
	int groups();
	int freqs();
	int stokes();
	int groupSize();
	int elemSize();
	double freq();

protected:
	bool init();
	bool getPrimary();
	Phdu * primary();
	bool copyHistory(fitsfile &ref);
			
private:
	string 	m_filename;
	Fits *	m_fits;
	SGroup 	m_group[5];
	SAxis 	m_axis[5];
	Phdu *	m_phdu;      // Primary Header Data Unit
	Thdu *	m_thdu;      // Primary Header Data Unit
	int		m_subChan;
	int		m_groupOfs;
};

fitsfile::fitsfile(string filename)
	:	m_filename(filename),
		m_fits(NULL),
		m_phdu(NULL),
		m_thdu(NULL),
		m_subChan(0),
		m_groupOfs(0)
{
	const string groupParNames[5] = { "UU", "VV", "WW", "BASELINE", "DATE" };
	const string axisNames[5] = { "COMPLEX", "STOKES", "FREQ", "RA", "DEC" };
	const int axisSize[5] = { 3, -1, -1, 1, 1 };
	for(int i = 0; i < 5; i++)
	{
		m_group[i].name = groupParNames[i];
		m_group[i].index = -1;
	}
	for(int i = 0; i < 5; i++)
	{
		m_axis[i].name = axisNames[i];
		m_axis[i].index = -1;
		m_axis[i].size = -1;
		m_axis[i].expectedSize = axisSize[i];
	}
}

fitsfile::~fitsfile()
{
	if(m_fits)
	{
		del_Fits(m_fits);
	}
	m_fits = NULL;
}

bool fitsfile::create(fitsfile &ref, int nGroups)
{
	if(m_fits)
	{
		del_Fits(m_fits);
		m_fits = NULL;
	}
	m_fits = new_Fits(m_filename.c_str(), 0, 0, 0, 0);
	if(m_fits == NULL)
	{
		return false;
	}
	m_phdu = (Phdu *)copy_Hdu((Hdu *)ref.m_phdu);
	if(m_phdu == NULL)
	{
		cerr << "Failed to create new primary HDU.\n";
		return false;
	}

	if(!init())
	{
		return false;
	}

	m_phdu->gcount = nGroups;
	m_phdu->dims[m_axis[eFreq].index] = 1;

	if(add_Hdu(m_fits, (Hdu *)m_phdu))
	{
		cerr << "Failed to add primary header to the FITS file.\n";
		return false;
	}
	if(!copyHistory(ref))
	{
		cerr << "Failed to copy history to the FITS file.\n";
		return false;
	}
	if(end_header(m_fits, (Hdu *)m_phdu))
	{
		cerr << "Failed to add primary header to the FITS file.\n";
		return false;
	}

	return true;
}

// Check that the input file is compatible with the reference file.
bool fitsfile::isCompatibleWith(fitsfile &ref)
{
	// It is expected that the dimension of the stokes axis should be the same in all input files.
	if(stokes() != ref.stokes())
	{
		cerr << "Error: The input files have an incompatible number of stokes parameters.\n";
		return false;
	}

	// It is also expected that the input files also have the same number of group parameters.
	if(groupSize() != ref.groupSize())
	{
		cerr << "Error: The input files have an incompatible numbers of group parameters.\n";
		return false;
	}

	return true;
}

bool fitsfile::init()
{
	for(int group_index = 0; group_index < sizeof(m_group) / sizeof(SGroup); group_index++)
	{
		int ngroup = find_gpar(m_phdu, m_group[group_index].name.c_str(), m_group[group_index].name.length(), 1);
		if(ngroup == 0)
		{
			cerr << "ERROR: Expected to find a group parameter '" << m_group[group_index].name << "'.\n";
			return false;
		}
		ngroup--;
		m_group[group_index].index = ngroup;
	}

	for(int axis_index = 0; axis_index < sizeof(m_axis) / sizeof(SAxis); axis_index++)
	{
		int naxis = find_axis(m_phdu, m_axis[axis_index].name.c_str(), m_axis[axis_index].name.length(), 1);
		if(naxis == 0)
		{
			cerr << "ERROR: Couldn't find the axis '" << m_axis[axis_index].name << "'.\n";
			return false;
		}
		naxis--;
		if(m_axis[axis_index].expectedSize != -1 && m_axis[axis_index].expectedSize != m_phdu->dims[naxis])
		{
			cerr << "ERROR: Expected the axis '" << m_axis[axis_index].name;
			cerr << "' to have a dimension of " << m_axis[axis_index].expectedSize;
			cerr << " but actually has " << m_phdu->dims[naxis] << "\n";
			return false;
		}
		m_axis[axis_index].index = naxis;
		m_axis[axis_index].size = m_phdu->dims[naxis];
	}
	return true;
}

bool fitsfile::open()
{
	if(m_fits)
	{
		del_Fits(m_fits);
		m_fits = NULL;
	}
	m_fits = new_Fits(m_filename.c_str(), 1, 1, 0, 0);
	if(m_fits == NULL)
	{
		return false;
	}
	if(!getPrimary())
	{
		cerr << "ERROR: Failed to find a primary header.\n";
		return false;
	}

	if(m_phdu->naxis < 6)
	{
		cerr << "ERROR: Insufficient axis.\n";
		return false;
	}

	if(m_phdu->groups == 0 || m_phdu->gcount < 5)
	{
		cerr << "ERROR: Insufficient group information.\n";
		return false;
	}

	if(!init())
	{
		return false;
	}
	
	/* Shouldn't really care about this ...
	if(m_axis[eFreq].size < 2)
	{
		cerr << "ERROR: Multiple frequency channels were not found so how can they be split?\n";
		return false;
	}*/

	m_thdu = find_table(m_fits, "AIPS AN", 0, NULL);
	if(m_thdu == NULL)
	{
		cerr << "ERROR: Could find an AIPS AN table.\n";
		return false;
	}
	return true;
}

bool fitsfile::split(fitsfile &fitsin, double refFreq)
{
	int elemsize = fitsin.elemSize();
	int grpsize = fitsin.groupSize();
	int ngroups = fitsin.groups();
	int newelemsize = elemSize();

	double *groups = new double [ngroups * grpsize];
	double *elems = new double [ngroups * elemsize];
	double *tempgroup = new double [grpsize];
	double *tempelem = new double [newelemsize];
	if(groups == NULL || elems == NULL || tempgroup == NULL || tempelem == NULL)
	{
		cerr << "ERROR: Insufficient memory.\n";
		if(groups)
			delete groups;
		if(elems)
			delete elems;
		if(tempgroup)
			delete tempgroup;
		if(tempelem)
			delete tempelem;
		return false;
	}

	cout << "Reading " << ngroups * fitsin.freqs() * fitsin.stokes() << " visibilities from " << fitsin.name() << "\n";
	int nGroup, nFreq;
	int scale = ngroups / 50;
	for(nGroup = 0; nGroup < ngroups; nGroup++)
	{
		// Read the group and image data for the current group.
		if(rgroup(fitsin.m_fits, fitsin.m_phdu, nGroup, 0, grpsize, DAT_DBL, 1, NULL, groups + nGroup * grpsize) != grpsize)
		{
			cerr << "ERROR: Failed to read group data from input file.\n";
			delete groups;
			delete elems;
			delete tempgroup;
			delete tempelem;
			return false;
		}
		if(rimage(fitsin.m_fits, fitsin.m_phdu, nGroup, 0, elemsize, DAT_DBL, 1, NULL, elems + nGroup * elemsize) != elemsize)
		{
			cerr << "ERROR: Failed to read image data from input file.\n";
			delete groups;
			delete elems;
			delete tempgroup;
			delete tempelem;
			return false;
		}
		if(nGroup % scale == 0)
		{
			showProgress(20, (float)nGroup / (float)ngroups);
			//cout << "*";
			//cout.flush();
		}
	}
	finalizeProgress(20);
//	cout << "Read the equivalent of " << fitsin.groups() * fitsin.freqs() * fitsin.stokes() << " visibilities.\n";

	// Get the IF for this file.
	Imaxis *freqAxis = get_axis(fitsin.m_phdu, fitsin.m_axis[eFreq].index + 1);
	double IFFreq = freqAxis->crval;
	double IFBW = freqAxis->cdelt;
	cout << "Splitting " << fitsin.freqs() << " frequency channels into sub-arrays.\n";
	for(nFreq = 0; nFreq < fitsin.freqs(); nFreq++)
	{
		double fscale = (IFFreq + (double)nFreq * IFBW) / refFreq;

		showProgress(20, (float)nFreq / (float)fitsin.freqs());
//		cout << "Writing Channel Frequency = " << (IFFreq + nFreq * IFBW) / 1.0e6 << " MHz ";
//		cout << "(" << fscale * 100.0 << "% of Reference) as sub-array " << m_subChan + 1 << ".\n";
		for(nGroup = 0; nGroup < ngroups; nGroup++)
		{
			memcpy(tempgroup, groups + nGroup * grpsize, sizeof(double) * grpsize);
			memcpy(tempelem, elems + nGroup * elemsize + nFreq * newelemsize, sizeof(double) * newelemsize);

			// Set up the sub-array number and date for the next frequency channel.
			tempgroup[m_group[eBaseline].index] += (double)m_subChan / 100.0;
			// For some reason the AIPS examples I have seem to add sub-chan*5 to
			// each of the times stamps. Initially this was included but I have also
			// tried experiments without this factor and the output was still OK. So
			// for now I am now longer included this "fudge".
//			tempgroup[m_group[eDate].index] += (double)m_subChan * 5.0;
			tempgroup[m_group[eUU].index] *= fscale;
			tempgroup[m_group[eVV].index] *= fscale;
			tempgroup[m_group[eWW].index] *= fscale;

			// Write the group and image data for the current group of the current sub-array.
			if(wgroup(m_fits, m_phdu, m_groupOfs /*m_subChan * ngroups*/ + nGroup, 0, grpsize, DAT_DBL, 1, NULL, tempgroup) != grpsize)
			{
				cerr << "ERROR: Failed to write group data to output file.\n";
				delete groups;
				delete elems;
				delete tempgroup;
				delete tempelem;
				return false;
			}
			if(wimage(m_fits, m_phdu, m_groupOfs /*m_subChan * ngroups*/ + nGroup, 0, newelemsize, DAT_DBL, 1, NULL, tempelem) != newelemsize)
			{
				cerr << "ERROR: Failed to write image data to output file.\n";
				delete groups;
				delete elems;
				delete tempgroup;
				delete tempelem;
				return false;
			}
		}
		m_subChan++;
		m_groupOfs += ngroups;
	}
	finalizeProgress(20);
	delete groups;
	delete elems;
	delete tempgroup;
	delete tempelem;

	return true;
}

bool fitsfile::closeData()
{
	if(end_data(m_fits, (Hdu *)m_phdu) != 0)
	{
		cerr << "ERROR: Failed to close data section of primary HDU.\n";
		return false;
	}
	
	return true;
}

void fitsfile::close()
{
	if(m_fits != NULL)
	{
		del_Fits(m_fits);
		m_fits = NULL;
		m_phdu = NULL;
		m_thdu = NULL;
	}
}

int fitsfile::addAntennae(fitsfile &fitsin, int startSubChan)
{
	cout << "Creating AIPS AN Tables for sub-arrays " << startSubChan + 1 << " - " << startSubChan + fitsin.freqs() << "\n";

	// Duplicate the AIPS AN table once for each sub-array created for
	// the input file (ie. the No. of original channels).
	for(int nSub = startSubChan + 1; nSub < startSubChan + fitsin.freqs() + 1; nSub++)
	{
		Hdu *anhdu = dup_Hdu(fitsin.m_fits, (Hdu *)(fitsin.m_thdu), m_fits);
		anhdu->extver = nSub;
		if(anhdu == NULL)
		{
			cerr << "ERROR: Failed to create new AIPS AN table.\n";
			return -1;
		}
	}
	return startSubChan + fitsin.freqs();
}

const char *fitsfile::name()
{
	return m_filename.c_str();
}

int fitsfile::groups()
{
	return m_phdu ? m_phdu->gcount : 0;
}

int fitsfile::freqs()
{
	return m_axis[eFreq].size;
}

int fitsfile::stokes()
{
	return m_axis[eStokes].size;
}

int fitsfile::groupSize()
{
	return m_phdu->pcount;
}

int fitsfile::elemSize()
{
	int elemsize = 1;
	for(int i = 1; i < m_phdu->naxis; i++)
		elemsize *= m_phdu->dims[i];
	return elemsize;
}

double fitsfile::freq()
{
	Imaxis *freqAxis;
	freqAxis = get_axis(m_phdu, m_axis[eFreq].index + 1);
	return freqAxis->crval;
}

bool fitsfile::getPrimary()
{
	m_phdu = NULL;
	Hdu *hdu = NULL;
	if(m_fits == NULL)
		return false;

	for(hdu = m_fits->hdu; hdu != NULL; hdu = hdu->next)
	{
		if(hdu->type == F_PRIMARY)
		{
			m_phdu = (Phdu *)hdu;
			return true;
		}
	}
	return false;
}

bool fitsfile::copyHistory(fitsfile &ref)
{
	Fitkey key;           // Keyword value pair returned by get_key()

	// Rewind to the first line of the primary HDU.
	new_hline((Hdu *)ref.m_phdu, 0);

	// Read and record one history line at a time.
	while(get_key(ref.m_fits, (Hdu *)ref.m_phdu, "HISTORY", DAT_COM, EOH_SEEK, &key) == KEY_FOUND)
	{
		if(wcomkey(m_fits, (Hdu *)m_phdu, "HISTORY", 0, KEYSTR(key), NULL) != 0)
			return false;
	}
	return true;
}

int main(int argc, char *argv[])
{
	vector<fitsfile> fitsin;
	vector<fitsfile> fitsout;

	for(int i = 1; i < argc; i++)
	{
		if(strcmp(argv[i], "-o") == 0)
		{
			if(i + 1 < argc)
			{
				fitsout.push_back(fitsfile(argv[++i]));
			}
		}
		else
		{
			fitsin.push_back(fitsfile(argv[i]));
		}
	}
	if(fitsout.size() != 1 || fitsin.size() == 0)
	{
		cout << "Usage " << argv[0] << "input-fits-file1[ ... input-fits-fileN] -o output-fits-file\n";
		return 1;
	}
	
	cout << "Using " << fitsin[0].name() << " as the reference data set.\n";

	// Open all of the input files and calculate the number of
	// groups in the new file assuming that all frequency
	// channels are to be converted to sub-channels.
	int nGroups = 0;
	for(int i = 0; i < fitsin.size(); i++)
	{
		if(!fitsin[i].open())
		{
			cerr << "ERROR: Failed to open " << fitsin[i].name();
			return 1;
		}
		if(i > 0)
		{
			if(!fitsin[i].isCompatibleWith(fitsin[0]))
			{
				cerr << "ERROR: The dimensions of " << fitsin[i].name() << " is not compatible with " << fitsin[0].name() << ".\n";
				return 1;
			}
		}
		nGroups += fitsin[i].groups() * fitsin[i].freqs();
	}

	// Create the new fits file.
	fitsout[0].create(fitsin[0], nGroups);

	// Get the reference frequency
	double refFreq = fitsin[0].freq();
	cout << "Reference frequency = " << refFreq / 1.0e6 << " MHz.\n\n";
	for(int i = 0; i < fitsin.size(); i++)
	{
		if(!fitsout[0].split(fitsin[i], refFreq))
		{
			cerr << "ERROR: Failed to split frequency channels into sub-arrarys.\n";
			return 1;
		}
	}
	fitsout[0].closeData();

	int nSubChan = 0;
	for(int i = 0; i < fitsin.size(); i++)
	{
		nSubChan = fitsout[0].addAntennae(fitsin[i], nSubChan);
		if(nSubChan == -1)
		{
			return 1;
		}
	}
	fitsout[0].close();

	cout << "\nA total of " << nGroups * fitsin[0].stokes() << " visibilities were written.\n\n";

	return 0;
}

The Ubuntu version does not match the original. For example, -L/usr/local/difmap2.4k/lib -lsphere has different meaning than -L/usr/local/uvf_difmap/lib/libsphere Try this:

g++-4.5 -o splitc splitc.o -L/usr/local/uvf_difmap/lib/ -L/usr/lib/x86_64-linux-gnu -lsphere -llogio -lpager -lcpgplot -lpng -lpgplot --lX11 -lfits -lrecio -lscrfil -lslalib -ltecla -lcurses /usr/lib/x86_64-linux-gnu/gcc/x86_64-linux-gnu/4.5/libgcc.a

As of what to do with the build script, make sure it has executable permissions, and just type its name at the command line.

Try this:

g++-4.5 -o splitc splitc.o -L/usr/local/uvf_difmap/lib/ -L/usr/lib/x86_64-linux-gnu -lsphere -llogio -lpager -lcpgplot -lpng -lpgplot --lX11 -lfits -lrecio -lscrfil -lslalib -ltecla -lcurses /usr/lib/x86_64-linux-gnu/gcc/x86_64-linux-gnu/4.5/libgcc.a

Thanks for the suggestion, but I am getting the same error.

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