Add an explicit initializer to std::stringstream.

QuLogic · QuLogic · commit 837398917d0d · 2020-05-23T01:50:22.000-04:00
When compiling with -fvisibility=hidden, a non-explicit initialization
seems to produce an implicit constructor, or at least one that is not
available in older libstdc++. When mixing a newer native compiler with
an older libstdc++ (such as in a conda environment), this causes the
library to fail to load from missing symbols.
diff --git a/src/ft2font.cpp b/src/ft2font.cpp
@@ -43,7 +43,7 @@
 FT_Library _ft2Library;
 
 void throw_ft_error(std::string message, FT_Error error) {
-    std::ostringstream os;
+    std::ostringstream os("");
     os << message << " (error code 0x" << std::hex << error << ")";
     throw std::runtime_error(os.str());
 }

Original file line number	Diff line number	Diff line change
`@@ -43,7 +43,7 @@`
`43`	`43`	`FT_Library _ft2Library;`
`44`	`44`
`45`	`45`	`void throw_ft_error(std::string message, FT_Error error) {`
`46`		`- std::ostringstream os;`
	`46`	`+ std::ostringstream os("");`
`47`	`47`	`os << message << " (error code 0x" << std::hex << error << ")";`
`48`	`48`	`throw std::runtime_error(os.str());`
`49`	`49`	`}`