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libfdt.h: add explicit cast from void* to uint8_t* in fdt(32|64)_st

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Including libfdt.h in a C++ project fails during compilation with recent
version of GCC or Clang.

This simple example:

extern "C" {
 #include <libfdt.h>
}

int main(void) { return 0; }

leads to the following errors with GCC 9.1.0:

/usr/include/libfdt.h: In function ‘void fdt32_st(void*, uint32_t)’:
/usr/include/libfdt.h:139:16: error: invalid conversion from ‘void*’ to ‘uint8_t*’ {aka ‘unsigned char*’} [-fpermissive]
  139 |  uint8_t *bp = property;
      |                ^~~~~~~~
      |                |
      |                void*
/usr/include/libfdt.h: In function ‘void fdt64_st(void*, uint64_t)’:
/usr/include/libfdt.h:163:16: error: invalid conversion from ‘void*’ to ‘uint8_t*’ {aka ‘unsigned char*’} [-fpermissive]
  163 |  uint8_t *bp = property;
      |                ^~~~~~~~
      |                |
      |                void*

This commit adds an explicit cast to uint8_t* to fix this issue.

Signed-off-by: Luc Michel <luc.michel@greensocs.com>
Message-Id: <20190910104824.1321594-1-luc.michel@greensocs.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Luc Michel 2019-09-10 12:48:24 +02:00 • committed by David Gibson
parent b111122ea5
commit 67f790c1ad
1 changed files with 2 additions and 2 deletions
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4
libfdt/libfdt.h
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@ -136,7 +136,7 @@ static inline uint32_t fdt32_ld(const fdt32_t *p)
static inline void fdt32_st(void *property, uint32_t value) static inline void fdt32_st(void *property, uint32_t value)
{ {
uint8_t *bp = property; uint8_t *bp = (uint8_t *)property;
bp[0] = value >> 24; bp[0] = value >> 24;
bp[1] = (value >> 16) & 0xff; bp[1] = (value >> 16) & 0xff;
@ -160,7 +160,7 @@ static inline uint64_t fdt64_ld(const fdt64_t *p)
static inline void fdt64_st(void *property, uint64_t value) static inline void fdt64_st(void *property, uint64_t value)
{ {
uint8_t *bp = property; uint8_t *bp = (uint8_t *)property;
bp[0] = value >> 56; bp[0] = value >> 56;
bp[1] = (value >> 48) & 0xff; bp[1] = (value >> 48) & 0xff;