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Fix/stdlib cxx div #394

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Fix/stdlib cxx div #394

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688aa57
R53: uart_bth4 rx overflow diagnostics
Sen70s Aug 15, 2026
4d367ff
tools: build.sh cmake defconfig path fix for absolute paths
Sen70s Aug 15, 2026
c9b1735
libc: skip the div_t/lldiv_t typedefs in C++ builds
Sen70s Sep 19, 2026
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3 changes: 3 additions & 0 deletions drivers/serial/uart_bth4.c
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Original file line number Diff line number Diff line change
Expand Up @@ -168,6 +168,9 @@
}
else
{
syslog(LOG_ERR,
"uart_bth4 rx dropped: circbuf full (type=%u len=%zu space=%u)\n",

Check failure on line 172 in drivers/serial/uart_bth4.c

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GitHub Actions / checkpatch / checkpatch 

Long line found
(unsigned int)type, buflen, circbuf_space(&dev->circbuf));
ret = -ENOMEM;
}

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16 changes: 15 additions & 1 deletion include/stdlib.h
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Original file line number Diff line number Diff line change
Expand Up @@ -87,7 +87,13 @@
* Public Type Definitions
****************************************************************************/

/* Structure type returned by the div() function. */
/* Structure type returned by the div() function.
* NOTE: In C++ the toolchain C library (newlib) already provides div_t etc.,
* and libstdc++'s <cstdlib> does include_next to the C stdlib, so defining
* them here would conflict. Skip them in C++ mode (TFLM/GCC13 build fix).
*/

#if !defined(__cplusplus)

struct div_s
{
Expand Down Expand Up @@ -117,6 +123,8 @@ struct lldiv_s

typedef struct lldiv_s lldiv_t;

#endif /* !defined(__cplusplus) */

/****************************************************************************
* Public Function Prototypes
****************************************************************************/
Expand Down Expand Up @@ -160,7 +168,11 @@ uint32_t arc4random(void);
FAR char **get_environ_ptr(void);

FAR char *getenv(FAR const char *);

/* putenv is provided by the toolchain C library in C++ mode */
#if !defined(__cplusplus)
int putenv(FAR const char *);
#endif

int clearenv(void);

Expand Down Expand Up @@ -266,11 +278,13 @@ long int labs(long int);
long long int llabs(long long int);
#endif

#if !defined(__cplusplus)
div_t div(int, int);
ldiv_t ldiv(long, long);
#ifdef CONFIG_HAVE_LONG_LONG
lldiv_t lldiv(long long, long long);
#endif
#endif /* !defined(__cplusplus) */

/* Temporary files */

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9 changes: 8 additions & 1 deletion tools/build.sh
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Expand Up @@ -126,7 +126,11 @@ function build_board_cmake()
GHS_OPTS_STRING="CONFIG_ARM_TOOLCHAIN_GHS=y"
TASKING_OPTS_STRING="CONFIG_TRICORE_TOOLCHAIN_TASKING=y"
defconfig_path=$1/defconfig
valid_defconfig_path=$(echo ${defconfig_path} | sed 's/^.\{3\}//')
if [[ ${defconfig_path} =~ ^/ ]]; then
valid_defconfig_path=$(echo ${defconfig_path} | sed 's/^.\{3\}//')
else
valid_defconfig_path=${defconfig_path}
fi
if grep -qE "^(${GHS_OPTS_STRING}|${TASKING_OPTS_STRING})$" "${valid_defconfig_path}"; then
echo "EXTRA_FLAGS are required to update the when using the GHS toolchain."
EXTRA_FLAGS=$(echo "$EXTRA_FLAGS" | sed 's/-Wno-cpp//' | xargs)
Expand All @@ -140,6 +144,9 @@ function build_board_cmake()
for arg in "${@:2}"
do
if [[ $arg == *config ]]; then
if [ ! -d "${CMAKE_BINARY_DIR}" ]; then
_do_cmake_generator
fi
if ! m $arg; then
echo "Error: ############# m $arg fail ##############"
exit 2
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