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annotate Resources/PostgreSQL/CheckTypeAlignment.cmake @ 433:5964ce6385a5 pg-transactions

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author Alain Mazy <am@osimis.io>
date Wed, 13 Dec 2023 15:48:56 +0100
parents 8c7bb94adff7
children
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172
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1 macro(CHECK_TYPE_ALIGNMENT TYPE NAME)
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2 if(NOT ${NAME})
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3 message(STATUS "Check alignment of ${TYPE}")
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4
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5 set(INCLUDE_HEADERS "#include <stddef.h>
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6 #include <stdio.h>
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7 #include <stdlib.h>")
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8
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9 if(HAVE_STDINT_H)
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10 set(INCLUDE_HEADERS "${INCLUDE_HEADERS}\n#include <stdint.h>\n")
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11 endif(HAVE_STDINT_H)
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13 file(WRITE "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/check_${NAME}_alignment.c"
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14 "${INCLUDE_HEADERS}
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15 int main(){
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16 char diff;
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17 struct foo {char a; ${TYPE} b;};
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18 struct foo *p = (struct foo *) malloc(sizeof(struct foo));
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19 diff = ((char *)&p->b) - ((char *)&p->a);
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20 return diff;}
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21 ")
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23 try_run(${NAME} COMPILE_RESULT "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/"
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24 "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/check_${NAME}_alignment.c")
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26 message(STATUS "Check alignment of ${TYPE} - ${${NAME}}")
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27
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28 endif(NOT ${NAME})
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29 endmacro()