sys/stdio: add printf_long_long

makefiles/pseudomodules.inc.mk

@@ -342,7 +342,20 @@ PSEUDOMODULES += picolibc
 PSEUDOMODULES += picolibc_stdout_buffered
 PSEUDOMODULES += pktqueue
 PSEUDOMODULES += posix_headers
+## @defgroup sys_stdio_printf_float         Support for printing floats
+## @ingroup sys_stdio
+## @{
+## This module enables printing of floats, if the printf implementation has
+## configurable features.
 PSEUDOMODULES += printf_float
+## @}
+## @defgroup sys_stdio_printf_long_long     Support for printing long long
+## @ingroup sys_stdio
+## @{
+## This module enables printing of long long / unsigned long long, if the printf
+##  implementation has configurable features.
+PSEUDOMODULES += printf_long_long
+## @}
 PSEUDOMODULES += prng
 PSEUDOMODULES += prng_%
 PSEUDOMODULES += psa_riot_cipher_aes_common

pkg/mpaland-printf/Makefile.dep

@@ -2,3 +2,9 @@
 # AVR MCUs we do need the ability to print from PROGMEM, though. Hence, this
 # is not compatible with AVR MCUs.
 FEATURES_BLACKLIST += arch_avr8
+
+# On 32 bit and 64 bit systems support for long long is so cheap, that we
+# can enable it by default. Users can still disable it, though.
+ifneq (,$(filter arch_32bit arch_64bit,$(FEATURES_USED)))
+  DEFAULT_MODULE += printf_long_long
+endif

pkg/mpaland-printf/patches/0003-RIOT-integration-Select-features-based-on-modules.patch

@@ -0,0 +1,41 @@
+From 4d6939143a251b93022980a472f2bcd9c42b8573 Mon Sep 17 00:00:00 2001
+From: Marian Buschsieweke <[email protected]>
+Date: Sat, 11 May 2024 18:38:51 +0200
+Subject: [PATCH 3/4] RIOT integration: Select features based on modules
+
+Using module `printf_float` adds support for printing floats, using
+module `printf_long_long` adds support for printing `long long` or
+`unsigned long long`.
+---
+ printf.c | 8 ++++----
+ 1 file changed, 4 insertions(+), 4 deletions(-)
+
+diff --git a/printf.c b/printf.c
+index d560d2b..6923fee 100644
+--- a/printf.c
++++ b/printf.c
+@@ -60,8 +60,8 @@
+ #endif
+
+ // support for the floating point type (%f)
+-// default: activated
+-#ifndef PRINTF_DISABLE_SUPPORT_FLOAT
++// default: deactivated
++#ifdef MODULE_PRINTF_FLOAT
+ #define PRINTF_SUPPORT_FLOAT
+ #endif
+
+@@ -84,8 +84,8 @@
+ #endif
+
+ // support for the long long types (%llu or %p)
+-// default: activated
+-#ifndef PRINTF_DISABLE_SUPPORT_LONG_LONG
++// default: deactivated
++#ifdef MODULE_PRINTF_LONG_LONG
+ #define PRINTF_SUPPORT_LONG_LONG
+ #endif
+
+-- 
+2.49.0
+