Use major version of the library in the soname

This avoids breaking the ABI in every single version.

Author: giordano

src/Make.inc

@@ -40,14 +40,14 @@ else ifeq ($(OS), Darwin)
 
   LIB_FULL_VERSION := libblastrampoline.$(LBT_SOVERSION_MAJOR).$(LBT_SOVERSION_MINOR).$(LBT_SOVERSION_PATCH).dylib
   LIB_MAJOR_VERSION := libblastrampoline.$(LBT_SOVERSION_MAJOR).dylib
-  SONAME_FLAG := -Wl,-install_name=@rpath/$(LIB_FULL_VERSION)
+  SONAME_FLAG := -Wl,-install_name=@rpath/$(LIB_MAJOR_VERSION)
 else
   SHLIB_EXT := so
   binlib := lib
 
   LIB_FULL_VERSION := libblastrampoline.so.$(LBT_SOVERSION_MAJOR).$(LBT_SOVERSION_MINOR).$(LBT_SOVERSION_PATCH)
   LIB_MAJOR_VERSION := libblastrampoline.so.$(LBT_SOVERSION_MAJOR)
-  SONAME_FLAG := -Wl,-soname=$(LIB_FULL_VERSION)
+  SONAME_FLAG := -Wl,-soname=$(LIB_MAJOR_VERSION)
 endif
 
 LBT_CFLAGS := -g -O2 -std=c99 -fPIC -DLIBRARY_EXPORTS -D_GNU_SOURCE $(CFLAGS) $(SONAME_FLAG)