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Use a macro to indicate C99 to the compiler

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The [AC_PROG_CC_C99 macro](https://www.gnu.org/software/autoconf/manual/autoconf-2.64/html_node/C-Compiler.html) sets the complier to the C99 standard if the compiler does not default to such behaviour (albeit gnu99). This is better than specifically hardcoding flags
This commit is contained in:
Sevan Janiyan
2016-01-05 11:43:17 +00:00
parent 537f8bcbdb
commit 7150b7f28d
1 changed files with 1 additions and 1 deletions
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2
configure.ac
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@@ -30,6 +30,7 @@ m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
# Checks for header files.
AM_PROG_CC_C_O
AC_PROG_CC_C99
AC_CONFIG_HEADER(config.h)
AC_CONFIG_HEADER(json_config.h)
AC_HEADER_STDC
@@ -104,7 +105,6 @@ AC_SUBST(JSON_BSYMBOLIC_LDFLAGS)
AX_APPEND_COMPILE_FLAGS([-Wall -Werror -Wno-error=deprecated-declarations])
AX_APPEND_COMPILE_FLAGS([-Wextra -Wwrite-string -Wno-unused-parameter])
AX_APPEND_COMPILE_FLAGS([-std=gnu99])
AX_APPEND_COMPILE_FLAGS([-D_GNU_SOURCE -D_REENTRANT])
AC_CONFIG_FILES([