updated .ld for pretty strings & fix reused attr warning

Author: mcspr

cores/esp8266/libc_replacements.cpp

@@ -97,7 +97,7 @@ int IRAM_ATTR _write_r(struct _reent* r, int file, char *ptr, int len) {
 
 int IRAM_ATTR _putc_r(struct _reent* r, int c, FILE* file) __attribute__((weak));
 
-int IRAM_ATTR _putc_r(struct _reent* r, int c, FILE* file) {
+int _putc_r(struct _reent* r, int c, FILE* file) {
     (void) r;
     if (file->_file == STDOUT_FILENO) {
       ets_putc(c);

tools/sdk/ld/eagle.app.v6.common.ld.h

@@ -247,6 +247,13 @@ SECTIONS
     *(.rodata._ZZ*__PRETTY_FUNCTION__)
     *(.rodata._ZZ*__func__)
 
+    /* __FUNCTION__ global statics */
+    *(.rodata.*__builtin_FILEstr*)
+    *(.rodata.*__builtin_FUNCTIONstr*)
+    *(.rodata.*__func__str*)
+    *(.rodata.*__FUNCTION__str*)
+    *(.rodata.*__PRETTY_FUNCTION__str*)
+
     /* std::* exception strings, in their own section to allow string coalescing */
     *(.irom.exceptiontext .rodata.exceptiontext)
     *(.rodata.*__exception_what__*) /* G++ seems to throw out templatized section attributes */