interpolate._ppoly doesn't build with MinGW

[rgommers]

MinGW 3.4.5 on Wine:

building 'scipy.interpolate._ppoly' extension
compiling C sources C compiler: gcc -mno-cygwin -O2 -Wall
-Wstrict-prototypes

compile options: '-DNO_ATLAS_INFO=1
-IC:\Python27\lib\site-packages\numpy\core\include -IC:\Python27\include
-IC:\Python27\PC -c' gcc -mno-cygwin -O2 -Wall -Wstrict-prototypes
-DNO_ATLAS_INFO=1 -IC:\Python27\lib\site-packages\numpy\core\include
-IC:\Python27\include -IC:\Python27\PC -c scipy\interpolate\_ppoly.c -o
build\temp.win32-2.7\Release\scipy\interpolate\_ppoly.o Found executable
C:\MinGW\bin\gcc.exe C:\MinGW\bin\g77.exe -g -Wall -mno-cygwin -g -Wall
-mno-cygwin -shared build\temp.win32-2.7\Release\scipy\interpolate\_ppoly.o
-LC:\local\lib\yop\nosse -LC:\MinGW\lib -LC:\MinGW\lib\gcc\mingw32\3.4.5
-LC:\Python27\libs -LC:\Python27\PCbuild -Lbuild\temp.win32-2.7 -llapack
-lblas -lpython27 -lg2c -o build\lib.win32-2.7\scipy\interpolate\_ppoly.pyd
build\temp.win32-2.7\Release\scipy\interpolate\_ppoly.o:_ppoly.c:(.text+0xc94):
undefined reference to `_imp__dgeev_' collect2: ld returned 1 exit status
error: Command "C:\MinGW\bin\g77.exe -g -Wall -mno-cygwin -g -Wall
-mno-cygwin -shared build\temp.win32-2.7\Release\scipy\interpolate\_ppoly.o
-LC:\local\lib\yop\nosse -LC:\MinGW\lib -LC:\MinGW\lib\gcc\mingw32\3.4.5
-LC:\Python27\libs -LC:\Python27\PCbuild -Lbuild\temp.win32-2.7 -llapack
-lblas -lpython27 -lg2c -o
build\lib.win32-2.7\scipy\interpolate\_ppoly.pyd" failed with exit status 1

[pv]

Underscore issue?

[pv]

Does this help? https://github.com/pv/scipy-work/compare/ppoly-blas

[rgommers]

No, it's the cdef extern that's the issue. All other Cython code does cdef extern from myheader.h. See http://mingw-users.1079350.n2.nabble.com/imp-prefixes-when-linking-td7386007.html for explanation.

[rgommers]

Ah, probably. Let me test.

[rgommers]

Yes, that branch builds fine.