use older GLIBC versions of functions to work on manylinux

Author: paulbkoch

build.sh

@@ -496,7 +496,7 @@ if [ "$os_type" = "Linux" ]; then
       bin_path_unsanitized="$tmp_path_unsanitized/gcc/bin/release/linux/x64/libebm"
       bin_file="libebm_linux_x64.so"
       g_log_file_unsanitized="$obj_path_unsanitized/libebm_release_linux_x64_build_log.txt"
-      both_args_extra="-m64 -DNDEBUG -O3 -Wl,--wrap=memcpy -Wl,--wrap=exp -Wl,--wrap=log -Wl,--wrap=log2,--wrap=pow"
+      both_args_extra="-m64 -DNDEBUG -O3 -Wl,--wrap=memcpy -Wl,--wrap=exp -Wl,--wrap=log -Wl,--wrap=log2,--wrap=pow,--wrap=expf,--wrap=logf"
       c_args_specific="$c_args $both_args $both_args_extra"
       cpp_args_specific="$cpp_args $both_args $both_args_extra"
       # the linker wants to have the most dependent .o/.so/.dylib files listed FIRST
@@ -527,7 +527,7 @@ if [ "$os_type" = "Linux" ]; then
       bin_path_unsanitized="$tmp_path_unsanitized/gcc/bin/debug/linux/x64/libebm"
       bin_file="libebm_linux_x64_debug.so"
       g_log_file_unsanitized="$obj_path_unsanitized/libebm_debug_linux_x64_build_log.txt"
-      both_args_extra="-m64 -O1 -Wl,--wrap=memcpy -Wl,--wrap=exp -Wl,--wrap=log -Wl,--wrap=log2,--wrap=pow"
+      both_args_extra="-m64 -O1 -Wl,--wrap=memcpy -Wl,--wrap=exp -Wl,--wrap=log -Wl,--wrap=log2,--wrap=pow,--wrap=expf,--wrap=logf"
       c_args_specific="$c_args $both_args $both_args_extra"
       cpp_args_specific="$cpp_args $both_args $both_args_extra"
       # the linker wants to have the most dependent .o/.so/.dylib files listed FIRST

python/interpret-core/interpret/glassbox/_ebm/_merge_ebms.py

@@ -324,6 +324,8 @@ def merge_ebms(models):
     else:
         raise Exception("Inconsistent model types being merged.")
 
+    # TODO: create the ExplainableBoostingClassifier etc, type directly
+    # by name instead of using __new__ from ebm_type
     ebm = ebm_type.__new__(ebm_type)
 
     if any(

shared/libebm/special/linux_wrap_functions.cpp

@@ -39,6 +39,8 @@ __asm__(".symver exp, exp@GLIBC_2.2.5");
 __asm__(".symver log, log@GLIBC_2.2.5");
 __asm__(".symver log2, log2@GLIBC_2.2.5");
 __asm__(".symver pow, pow@GLIBC_2.2.5");
+__asm__(".symver expf, expf@GLIBC_2.2.5");
+__asm__(".symver logf, logf@GLIBC_2.2.5");
 
 extern "C" {
    void * __wrap_memcpy(void * dest, const void * src, size_t n) {
@@ -56,6 +58,12 @@ extern "C" {
    double __wrap_pow(double base, double exponent) {
       return pow(base, exponent);
    }
+   float __wrap_expf(float x) {
+      return expf(x);
+   }
+   float __wrap_logf(float x) {
+      return logf(x);
+   }
 }
 
 #elif defined(__i386__)