diff --git a/loader/llext_exports.c b/loader/llext_exports.c
index c9bbc142..62f10fbd 100644
--- a/loader/llext_exports.c
+++ b/loader/llext_exports.c
@@ -17,6 +17,8 @@ EXPORT_SYMBOL(strstr);
 EXPORT_SYMBOL(strncmp);
 EXPORT_SYMBOL(strncpy);
 EXPORT_SYMBOL(strcasecmp);
+EXPORT_SYMBOL(strtod);
+EXPORT_SYMBOL(strtol);
 EXPORT_SYMBOL(strtoul);
 EXPORT_SYMBOL(strcmp);
 EXPORT_SYMBOL(strlen);
@@ -188,7 +190,6 @@ FORCE_EXPORT_SYM(close);
 FORCE_EXPORT_SYM(accept);
 FORCE_EXPORT_SYM(bind);
 FORCE_EXPORT_SYM(listen);
-EXPORT_SYMBOL(exit);
 FORCE_EXPORT_SYM(inet_pton);
 FORCE_EXPORT_SYM(sendto);
 FORCE_EXPORT_SYM(recvfrom);
@@ -232,6 +233,13 @@ EXPORT_SYMBOL(sprintf);
 EXPORT_SYMBOL(snprintf);
 EXPORT_SYMBOL(cbvprintf);
 FORCE_EXPORT_SYM(abort);
+EXPORT_SYMBOL(sscanf);
+EXPORT_SYMBOL(exit);
+FORCE_EXPORT_SYM(_exit);
+FORCE_EXPORT_SYM(__assert_no_args);
+EXPORT_SYMBOL(stdin);
+EXPORT_SYMBOL(stdout);
+EXPORT_SYMBOL(stderr);
 
 #if defined(CONFIG_RING_BUFFER)
 EXPORT_SYMBOL(ring_buf_get);
diff --git a/platform.txt b/platform.txt
index 888ee402..73d0705a 100644
--- a/platform.txt
+++ b/platform.txt
@@ -17,13 +17,13 @@ compiler.warning_flags.all=-Wall -Wextra
 
 compiler.path={build.compiler_path}
 compiler.c.cmd={build.crossprefix}gcc
-compiler.c.flags=-g -c {compiler.warning_flags} {compiler.zephyr.macros} "@{compiler.zephyr.cflags_file}" -MMD -mcpu={build.mcu} {build.float-abi} {build.fpu}
+compiler.c.flags=-g -c {compiler.define} {compiler.warning_flags} {compiler.zephyr.macros} "@{compiler.zephyr.cflags_file}" -MMD -mcpu={build.mcu} {build.float-abi} {build.fpu}
 compiler.c.elf.cmd={build.crossprefix}g++
 compiler.c.elf.flags=-Wl,--gc-sections -mcpu={build.mcu} {build.float-abi} {build.fpu} -std=gnu++17
 compiler.S.cmd={build.crossprefix}g++
 compiler.S.flags=-c -x assembler-with-cpp -mcpu={build.mcu} {build.fpu}
 compiler.cpp.cmd={build.crossprefix}g++
-compiler.cpp.flags=-g -Os -std=gnu++17 -c {compiler.warning_flags} {compiler.zephyr.macros} "@{compiler.zephyr.cxxflags_file}" {compiler.zephyr.common_ldflags} {compiler.zephyr.extra_ldflags} {compiler.zephyr.common_cxxflags} {compiler.zephyr.extra_cxxflags} -MMD -mcpu={build.mcu} {build.float-abi} {build.fpu}
+compiler.cpp.flags=-g -Os -std=gnu++17 -c {compiler.define} {compiler.warning_flags} {compiler.zephyr.macros} "@{compiler.zephyr.cxxflags_file}" {compiler.zephyr.common_ldflags} {compiler.zephyr.extra_ldflags} {compiler.zephyr.common_cxxflags} {compiler.zephyr.extra_cxxflags} -MMD -mcpu={build.mcu} {build.float-abi} {build.fpu}
 compiler.ar.cmd={build.crossprefix}ar
 compiler.ar.flags=rcs
 compiler.objcopy.cmd=
@@ -34,7 +34,7 @@ compiler.elf2hex.cmd={build.crossprefix}objcopy
 compiler.ldflags=
 compiler.libraries.ldflags=
 compiler.size.cmd={build.crossprefix}size
-compiler.define=-DARDUINO=
+compiler.define=-D_PICOLIBC_CTYPE_SMALL=1
 
 compiler.zephyr.includes_file={build.variant.path}/includes.txt
 compiler.zephyr.cflags_file={build.variant.path}/cflags.txt