Build fails against recent versions of poppler

[juanitotc]

I suspect there will be several problems, but here's one:

'''
g++ -flto -march=armv8-a+crc -mtune=cortex-a72 -Os -pipe -fno-exceptions -fno-rtti -DHAVE_CONFIG_H -I. -DDATADIR="/usr/local/share/flaxpdf" -DLOCALEDIR="/usr/local/share/locale" -isystem /usr/local/include -fvisibility-inlines-hidden -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_THREAD_SAFE -D_REENTRANT -isystem /usr/local/include/poppler -isystem /usr/local/include -Wall -Wextra -ffunction-sections -fdata-sections -MT loadfile.o -MD -MP -MF .deps/loadfile.Tpo -c -o loadfile.o loadfile.cpp
loadfile.cpp:193: warning: ignoring '#pragma omp parallel' [-Wunknown-pragmas]
193 | #pragma omp parallel for schedule(guided)
|
loadfile.cpp:221: warning: ignoring '#pragma omp parallel' [-Wunknown-pragmas]
221 | #pragma omp parallel for schedule(guided)
|
loadfile.cpp:229: warning: ignoring '#pragma omp parallel' [-Wunknown-pragmas]
229 | #pragma omp parallel for schedule(guided)
|
loadfile.cpp: In function 'void loadfile(const char*)':
loadfile.cpp:282:42: error: no matching function for call to 'PDFDoc::PDFDoc(GooString*)'
282 | PDFDoc *pdf = new PDFDoc(&gooname);
'''